ColdFusion and GCP PubSub

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Последнее обновление 2 июн. 2023 г.

Overview
Install gcppubsub package
Get credentials to access GCP PubSub
Add cloud service credentials and configuration
ColdFusion Administrator
Add credentials and configuration using CFSetup
Topic management
Subscription management
Publish
Snapshot management
Security APIs
Schema management

Overview

Pub/Sub is a publish/subscribe (Pub/Sub) service, a messaging platform that separates message senders and recipients. A Pub/Sub service has several important entities, including:

Message: the data that moves through the service.
Topic: a named entity that represents a feed of messages.
Subscription: a named entity that represents an interest in receiving messages on a particular topic.
Publisher (also called a producer): creates messages and sends (publishes) them to the messaging service on a specified topic.
Subscriber (also called a consumer): receives messages on a specified subscription.

For more information, see GCP Pub/Sub.

Install gcppubsub package

ColdFusion Administrator

To install the package gcppubsub, use the Package Manager page in the ColdFusion Administrator.

ColdFusion Package Manager

Navigate to <CF_HOME>/cfusion/bin.
Enter the command:
- Windows: cfpm.bat
- Non-Windows: ./cfpm.sh
Enter the command, install gcppubsub.

Wait for the package to get installed.

Install the package in a non-interactive mode

Open the command prompt, navigate to the coldFusion/cfusion/bin folder, and enter, cfpm install gcppubsub

For more information, see ColdFusion Package Manager.

Get credentials to access GCP PubSub

When you interact with GCP, you specify your GCP security credentials to verify your credentials and check whether you have permission to access the resources that you are requesting.

GCP uses the security credentials to authenticate and authorize your requests.

For more information, see GCP API Keys Overview.

Authentication for GCP services

To access GCP services, create a service account using Google cloud console (you may alternatively use gcloud CLI, REST calls or do it programmatically). Such accounts are managed by Google Cloud's Identity and Access Management (IAM).

For more information, see Authentication for GCP Services.

Add cloud service credentials and configuration

Use the method getCloudService() that gives you a handle to create objects for accessing various cloud services.

The syntax of the service handle is as follows:

service=getCloudService(struct cloudCred,struct cloudConfig), where:

cloudCred: Defines the credentials for the cloud service. It could either be a struct or a string (also known as credential alias).
cloudConfig: Defines the cloud service configuration details. It could either be a struct or a string (also known as config alias).

ColdFusion Administrator

Add the credentials via Data & Services > Cloud Credentials.

Add the configuration via Data & Services > Cloud Configuration.

Once you’ve created the credentials and configuration, on the cfm file, you can define the credentials and configuration as pubsubclient=getCloudService(cred, conf).

Add credentials and configuration using CFSetup

Cloud configuration

Add

add cloudconfiguration alias=pubsubdemo servicename=pubsub

Set

set cloudconfiguration pubsubdemo elementCountThreshold=102 requestByteThreshold=2048 delayThreshold=10m

The list below mentions the other parameters:

publisher.endpoint
enableMessageOrdering
enableCompression
compressionBytesThreshold
enableBatching
delayThreshold
elementCountThreshold
requestByteThreshold
publisher.limitExceededBehavior
publisher.maxOutstandingElementCount
publisher.maxOutstandingRequestBytes
publisher.threadCount
publisher.threadNamePrefix
publisher.initialRetryDelay
publisher.maxRetryDelay
publisher.retryDelayMultiplier
publisher.initialRpcTimeout
publisher.maxRpcTimeout
publisher.rpcTimeoutMultiplier
publisher.totalTimeout
publisher.maxAttempts
subscriber.endpoint
maxAckExtensionPeriod
minDurationPerAckExtensionPeriod
maxDurationPerAckExtensionPeriod
parallelPullCount
useLegacyFlowControl
subscriber.limitExceededBehavior
subscriber.maxOutstandingElementCount
subscriber.maxOutstandingRequestBytes
subscriber.threadCount
subscriber.threadNamePrefix
system.threadCount
system.threadNamePrefix

Usage Example,

set cloudconfiguration pubsubdemo publisher.endpoint=pubsub.googleapis.com subscriber.endpoint=us-east1-pubsub.googleapis.com:443 enableMessageOrdering=false enableCompression=False compressionBytesThreshold=1 delayThreshold='2m'

Show

Cloud credential: show cloudcredential <cred_name>
Cloud configuration: show cloudconfiguration <conf_name>

Delete

Cloud credential: delete cloudcredential <cred_name>
Cloud configuration: delete cloudconfiguration <conf_name>

Примечание.

All GCP resource names are case-sensitive.

Guidelines for naming a topic, subscription, schema, or snapshot

To see the guidelines on naming, see this doc.

Message format of a topic in PubSub

Message format to be sent to a GCP Pubsub topic.

{
  "data": string/struct/CFC/query/array/binary data
  "attributes": {
    string: string,
    ...
  },
  "messageId": string,
  "publishTime": string,
  "orderingKey": string
}

Message format that you receive from GCP PubSub service when you pull messages from a subscription using the pullMessages method:

Message = { 
	MessageID: "", 
	Data: “Hello World!”, 
	Attributes: { 
		year: “2020”, 
		author: “Martin Kleppman” 
}, // Attribute’s key-value pairs must be only strings. Other data types are not supported. 
OrderingKey: "", 
PublishTime: "", 
AttributesCount: 2, 
AckId: "", 
DeliveryAttempts: 1 
}

Message format that you receive in the onSuccess message handler while receiving messages asynchronously using a registed message handler:

Message = { 
	MessageID: "", 
	Data: “Hello World!”, 
	Attributes: { 
		year: “2020”, 
		author: “Martin Kleppmann” 
}, // Attribute’s key-value pairs must be only strings. Other data types are not supported. 
OrderingKey: "", 
PublishTime: "", 
AttributesCount: 2 
}

Topic management

Create a topic with attributes

Syntax

createTopic(topicName [, structAttributes])

Parameters

The topic attributes struct has the following key-value pairs:

Parameter	Description	Required
topicName	Name of the topic to be created.	Yes
messageRetentionDuration	Specifies how long the Pub/Sub topic retains messages after publication. After the message retention duration is over, Pub/Sub might discard the message regardless of its acknowledgment state. The acceptable range of values of a duration of a message in a topic is 10 minutes to 31 days. The duration parameters accepted are: m-milliseconds s-seconds M-minutes d-days	Yes
schemaSettings	Struct of the following: schemaName schemaEncoding (Binary or JSON)	Yes
labels	Topic label as key-value pairs.	Yes
messageStoragePolicy	Specifies which regions your messages are stored in, you can configure a message storage policy on your topic.	Yes
kmsKeyName	Specifies if the topic is encrypted with a CMEK(customer-managed encryption key). Pub/Sub encrypts messages with Google-managed keys by default. For more information, see this doc.	Yes

Returns

Topic id.

For Example,

<cfscript>
    cred = {
		projectId : "<your project id>",
		credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
        pubsubclient=getCloudService(cred, conf)
        topicName = "mytopic"
	topicAttributes = {
        messageRetentionDuration : "600s", 
        schemaSettings : {
            schemaName : "my-schema",
            schemaEncoding : "JSON" // or "BINARY"
        },
        labels : {
            "shape" : "circle",
            "color" : "green"
        },
        messageStoragePolicy: ["asia-northeast1"],
        kmsKeyName = "projects/my-gcp-project/locations/asia-northeast1/keyRings/customKMSKey/cryptoKeys/customManagedKey"
           }
       Topic = pubsubClient.createTopic(topicName, topicAttributes)
</cfscript>

List topics

Syntax
pubSubClient.listTopics(listAttributesStruct)
Returns the number of topics. By default, 100 topics are returned. The return type is a list.

Parameters

Parameter	Description	Required
pageSize	The maximum number of subscriptions to return.	No
nextPageToken	The value to return the next page of subsciptions.	No

For next page in the list of topics, call listTopics passing the nextPageToken value in the attributes struct.

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
    Pubsubclient = getCloudService(cred, conf)
    topics = pubsubclient.listTopics({pageSize: 100})
    Writedump(topics)
</cfscript>

Delete a topic

Syntax
deleteTopic(topicName)

Parameters

Parameter	Description
topicName	Name of the topic to be deleted.

For Example,

<cfscript>
        cred = {
            projectId : "<your project id>",
            credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
        pubsubclient=getCloudService(cred, conf)
        topicName="mytopic"
        pubsubclient.createTopic(topicName)
        pubsubclient.deleteTopic(topicName)
</cfscript>

List topic subscriptions

Syntax
listTopicSubscriptions(topicName)

Parameters

Parameter	Description
topicName	Name of the topic that has subscriptions.

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
        pubsubclient=getCloudService(cred, conf)
        topicName="mytopic"
        subName1="subscription_01"
        subName2="subscription_02"
        subscriptionMetadata1 = {
		"subscriptionName" : subName1
	}
        subscriptionMetadata2 = {
		"subscriptionName" : subName2
	}
        topic=pubsubclient.createTopic(topicName)
        // add a subscription
        subscription1=topic.subscribe(subscriptionMetadata1)
        subscription2=topic.subscribe(subscriptionMetadata2)
        subscriptions = topic.listSubscriptions()
        writeDump(subscriptions)
</cfscript>

Update a topic

Syntax
updateTopic(topicName, topicAttributes)

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
        pubsubclient=getCloudService(cred, conf)
            topicName = "mytopic"
    topicAttributes= {
		labels : {
			shape : "square",
			color : "blue"						
    },
		messageStoragePolicy: ["asia-east1-a", "europe-west1-c"],
		messageRetentionDuration: "600s",
		schemaSettings : {
			schemaName : "testSchema",
			schemaEncoding : "Binary"
		}
	}
        topic = pubsubclient.createTopic(topicName, topicAttributes)
        updatedTopicAttributes = {
		labels : {
			size : "10cm",
		},
		messageRetentionDuration: "300s"
	}
        pubsubclient.updateTopic(topicName, updatedTopicAttributes)
</cfscript>

Topic object methods

Struct publish(Struct messageMetadata)
Subscription subscribe(String subscriptionName)
Subscription subscribe(Struct subscriptionMetadata)
Subscription getSubscription(String subscriptionName)
Subscription updateSubscription(Struct subscriptionMetadata)
Struct detachSubscription(String subscriptionName)
Struct deleteSubscription(String subscriptionName)
Struct listSubscriptionsS)
Struct listSubscriptions(Struct listMetadata)S
Struct listSnapshots()
Struct listSnapshots(Struct listMetadata)
String getId()
String getName()
void setKmsKeyName(String keyName)
void setMessageRetentionDuration(String duration)
void setMessageStoragePolicy(Array messageStoragePolicy)
void setLabels(Struct labels)
void addLabels(Struct labels)
String getKmsKeyName()
String getMessageRetentionDuration()
Array getMessageStoragePolicy()
Struct getLabels()
boolean containsLabels(String key)
Struct getSchemaSettings()
void delete()
Struct getIAMPolicy(Struct policyMap)
Struct setIAMPolicy(Struct policyMap)
Struct addIAMPolicy(Struct policyMap)
Struct testIAMPermissions(Struct permissionsMap)
Struct publishAllOutstanding()
Struct resumePublish(String orderingKey)

Subscription management

Detach a subscription

Description

When the user detaches a subscription, the subscription is no longer allowed to read any data from the topic, and all the stored messages on the subscription, unacknowledged and acknowledged, are dropped.

Syntax
detachSubscription(subscriptionName)

Returns

A struct of subscriptions.

Parameters

Parameter	Description	Required
subscriptionName	Name of the subscription to be detached from a topic. The subscription does not get deleted. It can be attached to another topic or re-attached to the original topic.	Yes

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
    pubsubclient=getCloudService(cred, conf)
    topicName = "myTopic"
    subName="mySubscription"
    subscriptionAttributes= {
		"subscriptionName" : subName
	}
    topic = pubsubclient.createTopic(topicName)
    subscription=topic.subscribe(subscriptionMetadata)
    topic.detachSubscription(subName)
</cfscript>

Update a subscription

Syntax
Pubsubclient.updateSubscription(subscriptionAttributesStruct)
Subscription.updatesubscription(subscriptionAttributesStruct)

All PubSub entity names are case-sensitive.

Parameters

Parameter	Description	Required
topicName	The name of the topic.	Yes
SubscriptionName	Subscription ID	Yes
deliveryConfig	Struct of the following: ackDeadlineSeconds messageRetentionDuration enableMessageOrdering retainAckedMessages expirationPolicy enable ttl	Yes
retryPolicy	Struct of the following: enable minimumBackoff maximumBackoff	Yes
deadLetterPolicy	Struct of the following: deadLetterTopic maxDeliveryAttempts	Yes
labels	Struct containing- author, year, env.	Yes
filter	Filter attributes of the topic.	Yes

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
    pubsubclient=getCloudService(cred, conf)
    topicName = "myTopic"
    subName= "mySubscription"
    subscriptionDetails = {
		subscriptionName : subName,
		topicName : topicName,
		AckDeadlineSeconds : "600s",
		enableExactlyOnceDelivery : false,
		enableMessageOrdering : false,
		retainAckedMessages : false,
		MessageRetentionDuration = "700s"
filter = "attributes.color='green"

	}
    subscription= pubsubclient.subscribe(subscriptionDetails)
		label="listProjectSubscriptions")
    newAttributes = {
		subscriptionName : subName,
		enableExactlyOnceDelivery : true,
		AckDeadlineSeconds : "400s",
		enableMessageOrdering : true,
		retainAckedMessages : true,
		MessageRetentionDuration : "120s"
		filter = "attributes.color='red"
	}
        pubsubClient.updateSubscription(newAttributes)
</cfscript>

Delete a subscription

Syntax
deleteSubscription(subscriptionName)

Parameters

Parameter	Description	Required
subscriptionName	Name of the subscription to be deleted from a topic.	Yes

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    topicName = "myTopic"
    subName="mySubscription"
    subscriptionAttributes = {
        "subscriptionName" : subName
    }
    topic = pubsubclient.createTopic(topicName)
    topic.subscribe(subscriptionAttributes)
    topic.deleteSubscription(subName)
</cfscript>

Publish

Publish a message

Syntax
publish(messageAttributes)

Parameters

Parameter	Description	Required
data	The data to publish in the topic.	Yes
attributes	Struct of: author year	Yes
orderingKey	The filter to apply to the topic.	Yes

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
    pubsubclient=getCloudService(cred, conf)
    topicName="myTopic"
    topic= pubsubClient.createTopic(topicName)
       	message = {		
            data: "hello world!"
    }
	subName = "mysubscription"
	subscriptionAttributes= {
		"subscriptionName" : subName,
		"topicName" : topicName
	}	
       topic.subscribe(subscriptionAttributes)
        cffuture=topicObj.publish(message)
        MessageID = Cffuture.get()
        writeOutput("Message with ID #MessageID# published")
</cfscript>

Examples of message publishing

Publish a message to topic Asynchronously

messageMetadata = {       
    data: "Hello World 12345!",
    attributes: {
        author: "Martin Kleppmann",
        age: 33,
    }
}
  
publishedFuture = topic.publish(messageMetadata)
WriteDump(publishedFuture.get()) // It should return the published message id.

Publish a message to topic with Avro encoding

MyCFC cfcObj = new MyCFC()
 
messageMetadata = {
    data: serializeAVRO(cfcObj, schema),
    attributes: {
        "attribute1" : "value1",
        "attribute2" : "value2"
    }
}
 
publishedFuture = topic.publish(messageMetadata)
WriteDump(publishedFuture.get()) // It should return the published message id.

Publish a message to topic with Protobuf encoding

MyCFC cfcObj = new MyCFC()
 
messageMetadata = {
    data: serializeProtoBuf(cfcObj, schema),
    attributes: {
        "attribute1" : "value1",
        "attribute2" : "value2"
    }
}
 
publishedFuture = topic.publish(messageMetadata)
WriteDump(publishedFuture.get()) // It should return the published message id.

Publish a message to topic with Batch settings

<cfscript>
    gcpCred = {
        vendorName: "GCP",
        alias: "gcp_cred_alias"  // This alias must be defined in the CF Administrator.
    }
 
    pubsubConfig = {
        alias: "PubSubOne",
        serviceName: "PUBSUB",
        publisherSettings: {
            batchingSettings: {    
            enable: true,              // default: false
            elementCountThreshold : 1, // default: 100 messages
            requestByteThreshold : 50, // default: 1000 bytes
            delayThreshold : "100m"    // default: 1 milliseconds
        }
    }
    };
 
    pubsub = getCloudService(gcpCred, pubsubConf)
    myTopic = pubsub.getTopic("myTopic")
 
    messageMetadata = {
        "data" : "Hello World!!"
    }
 
    publishedFuture = topic.publish(messageMetadata)
    WriteDump(publishedFuture.get()) // It should return the published message id.
</cfscript>

Publish a message to a topic with Concurrency control

<cfscript>
    gcpCred = {
        vendorName:"GCP",
        alias: "gcp_cred_alias" // This alias must be defined in the CF Administrator.
    }
 
    pubsubConfig = {
        alias: "PubSubOne",
        serviceName: "PUBSUB",
        publisherSettings: {
            executorProvider: {
            threadCount: 4,
            threadNamePrefix: "cf-pubsub-thread"   
        }
    }
    }
 
    pubsub = getCloudService(gcpCred, pubsubConf)
    topic = pubsub.getTopic("myTopic")
 
    messageMetadata = {
        "data" : "Hello"
    }
 
    publishedFuture = topic.publish(messageMetadata)
    WriteDump(publishedFuture.get()) // It should return the published message id.
</cfscript>

Publish a message to topic with Custom attributes

<cfscript>
    gcpCred = {
        vendorName: "GCP",
        alias: "gcp_cred_alias"  // This alias must be defined in the CF Administrator.
    }
 
    pubsubConf = {
        alias: "pubsub_conf_alias",
        serviceName: "PUBSUB"
    }
 
    pubsub = cloudService(gcpCred, pubsubConf)
    topic = pubsub.getTopic("myTopic")
 
    messageMetadata = {        
        message: {
        data: "Hello World 12345!",
        attributes: {
            author : "Martin Fowler",
            year : 2014
        }
        }
    }
     
    publishedFuture = topic.publish(messageMetadata)
    WriteDump(publishedFuture.get()) // It should return the published message id.
</cfscript>

Publish a message to topic with Flow Control Settings

<cfscript>
    gcpCred = {
        vendorName:"GCP",
        alias: "gcp_cred_alias" // This alias must be defined in the CF Administrator.
    }     
     
    pubsubConfig = {
        alias: "PubSubOne",
        serviceName: "PUBSUB",
        publisherSettings: {
            batchingSettings: {    
                enable: true,
                elementCountThreshold: 1,  // default: 100 messages
                requestByteThreshold: 50,  // default: 1000 bytes
                delayThreshold: "100m",    // default: 1 milliseconds
                flowControlSettings: {
                    maxOutstandingRequestBytes : 10240,
                    maxOutstandingElementCount : 100,
                    limitExceededBehavior : "Block"  // Supported values: Block, Ignore, ThrowException
                }
            }
        }
    }
     
    pubsub = getCloudService(gcpCred,pubsubConf)
    topic = pubsub.getTopic("myTopic")
      
    messageMetadata = {        
        message: {
            data : "Hello World 12345!",
            attributes : {
                author : "Martin Fowler",
                year : 2014
            }
        }
    } 
     
    publishedFuture = topic.publish(messageMetadata)
    WriteDump(publishedFuture.get()) // It should return the published message id.
</cfscript>

Publish a message to topic with Ordering Keys

<cfscript>
    gcpCred = {
        vendorName:"GCP",
        alias: "gcp_cred_alias" // This alias must be defined in the CF Administrator.
     }    
     
    pubsubConfig = {
        alias: "PubSubOne",
        serviceName: "PUBSUB",
        publisherSettings: {
            endpoint: "asia-northeast1-pubsub.googleapis.com:443",
            enableMessageOrdering: "true"
        }
    }
     
    pubsub = getCloudService(gcpCred, pubsubConf)
    topic = pubsub.getTopic("myTopic")
     
    messageMetadata = {
        message: {
            data: "Hello World 12345!",
            orderingKey: "NamingFilter"
        }
     }
     
    publishedFuture = topic.publish(messageMetadata)
    WriteDump(publishedFuture.get()) // It should return the published message id.
</cfscript>

Publish a message to topic with Retry settings

<cfscript>
    gcpCred = {
        vendorName:"GCP",
        alias: "gcp_cred_alias" // This alias must be defined in the CF Administrator.
    }
     
    pubsubConfig = {
        alias: "PubSubOne",
        serviceName: "PUBSUB",
            publisherSettings: {
                retrySettings: {       
                    initialRetryDelay.      : "100m",       // default: 100 ms
                    initialRpcTimeout       : "5s",     // default: 5 seconds
                    maxAttempts             : 5,        // default: 0
                    maxRetryDelay           : "60s",    // default : 60 seconds
                    maxRpcTimeout           : "10M",    // default: 600 seconds
                    maxDelayMultiplier      : 2,        // back off for repeated failures, default: 1.3
                    rpcTimeoutMultiplier    : 1,        // default: 1.0
                    totalTimeout            : "10M" // default: 600 seconds
                }
            }
        }
     
    pubsub = getCloudService(gcpCred,pubsubConfing)
    topic = pubsub.getTopic("myTopic")    
     
    messageMetadata = {
        "messages" : [{
            data : "Hello World!"
        }]
    }
     
    publishedFuture = topic.publish(messageMetadata)
    WriteDump(publishedFuture.get()) // It should return the published message id.
</cfscript>

Publish all outstanding messages

Syntax

publishAllOutstanding(topicName)

Parameters

Parameter	Description	Required
topicName	The name of the topic.	Yes

Example

<cfscript>
       cred = {
           projectId : “<your project id>“,
           credentialJsonFilePath : “<path to your credentials json file>”
       }
       conf = {
           serviceName : “pubsub”
       }
       pubsubclient = getCloudService(cred, conf)
       response = pubsubclient.publishAllOutstanding(“myTopic”)
       WriteDump(response)
</cfscript>

Subscription object methods

String getId()
String getName()
String getTopicId()
String getTopicName()
int getAckDeadlineSeconds()
Struct getLabels()
String getMessageRetentionDuration()
boolean isEnableExactlyOnceDelivery()
boolean isEnableMessageOrdering()
boolean isRetainAckedMessages()
boolean isDetached()
boolean containsLabels(String key)
String getFilter()
Struct getExpirationPolicy()
Struct getRetryPolicy()
Struct getDeadLetterPolicy()
Struct getPushConfig()
Struct getBigQueryConfig()
void setAckDeadlineSeconds(long seconds)
void setLabels(Struct labels)
void addLabels(Struct labels)
void setMessageRetentionDuration(String duration)
void setEnableExactlyOnceDelivery(boolean enableExactlyOnceDelivery)
void setRetainAckedMessages(boolean retainAckedMessages)
Struct setDetached(boolean detached)
void setExpirationPolicy(Struct expirationPolicy)
void setRetryPolicy(Struct retryPolicy)
void setDeadLetterPolicy(Struct deadLetterPolicy)
void setDeliveryConfig(Struct deliveryConfig)
void registerMessageHandler(Struct messageHandlerMetadata)
Struct pullMessages(Struct pullMessageMetadata)
Struct acknowledgeMessages(Struct acknowledgeMetadata)
Struct modifyAckDeadline(Struct ackDeadlineMetadata)
Struct seekMessages(Struct seekMessageMetadata)
Struct getIAMPolicy(Struct policyStruct)
Struct setIAMPolicy(Struct policyStruct)
Struct addIAMPolicy(Struct policyStruct)
Struct testIAMPermissions(Struct permissionsStruct)
Struct delete()

Snapshots

Create a snapshot

Syntax
createSnapshot(snapshotAttributes)

Parameters

Parameter	Description	Required
snapshotName	Name of the snapshot to be created.	Yes
subscriptionName	Name of the subscription.	Yes

For Example,

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
	}
	conf = {
		serviceName : "pubsub"
	}
    pubsubclient=getCloudService(cred, conf)
    topicName = "myTopic"
    topic = pubsubClient.createTopic(topicName)
    subName="mysubscription"
    subscriptionMetadata = {
		"subscriptionName" : subName
	}
    // create the subscription
    topic.subscribe(subscriptionMetadata)
    // create the snapshot
    snapshotName="snshot-01"
    snapshotAttributes = {
	    snapshotName: snapshotName,
		subscriptionName: subName,
		labels : {
			name : "wrench",
			mass : "13kg",
			createdtime : dateTimeFormat(now(), "hh-nn_mm-dd-yyyy"),
			emptykey : ""
		}
	}
        snapshotResponse=pubsubClient.createSnapshot(snapshotAttributes)
    </cfscript>

Get a snapshot

Syntax
getSnapshot(snapshotName)

Parameters

Parameter	Description	Required
snapshotName	Name of the snapshot whose details are to be retrieved.	Yes

For Example,

<cfscript>
      cred = {
		projectId : "my-gcp-project",
		credentialJsonFilePath : "path of creds json file"
	};
	conf = {
		serviceName : "pubsub"
	};
    pubsubclient=getCloudService(cred, conf)
    topicName = "topic-ss-02"
    // create the topic
    topic = pubsubClient.createTopic(topicName)
    subName="sub-name-ss-02"
    subscriptionMetadata = {
		"subscriptionName" : subName
	}
    // create the subscription
    topic.subscribe(subscriptionMetadata)
    // create the snapshot
    snapshotName="snshot-02"
    snapshotAttributes = {
	    snapshotName: snapshotName,
		subscriptionName: subName,
		labels : {
			name : "wrench",
			mass : "13kg",
			createdtime : dateTimeFormat(now(), "hh-nn_mm-dd-yyyy"),
			emptykey : ""
		}
	}
    // create a snapshot
    pubsubClient.createSnapshot(snapshotAttributes)
    // get the snapshot
    getResponse=pubsubClient.getSnapshot(snapshotName)
    writeDump(getResponse)
</cfscript>

Update a snapshot

Syntax
updateSnapshot(updatedSnapshotAttributes)

For Example,

<cfscript>
       cred = {
		projectId : "my-gcp-project",
		credentialJsonFilePath : "C:\GCP-keys\my-gcp-project-ab38bee5f1e0.json"
	};
	conf = {
		serviceName : "pubsub"
	};
    pubsubclient=getCloudService(cred, conf)
    topicName="topic-update-ss01"
    // create the topic
    topic = pubsubClient.createTopic(topicName)
    subName="subupdate-ss01"
    subscriptionMetadata = {
		"subscriptionName" : subName
	}
    // create the subscription
    topic.subscribe(subscriptionMetadata)
    // create the snapshot
    snapshotName="snshot-ss-01"
    snapshotAttributes = {
	    snapshotName: snapshotName,
		subscriptionName: subName,
		labels : {
			name : "wrench",
			mass : "13kg",
			createdtime : dateTimeFormat(now(), "hh-nn_mm-dd-yyyy"),
			emptykey : ""
		}
	}
    // create a snapshot
    pubsubClient.createSnapshot(snapshotAttributes)
    updatedSnaphotAttributes={
        snapshotName: snapshotName,
		subscriptionName: subName,
		labels : {
			name : "shovel",
			mass : "5kg",
			createdtime : dateTimeFormat(now(), "hh-nn_mm-dd-yyyy"),
			emptykey : ""
		}
    }
    // update the snapshot
        pubsubClient.updateSnapshot(updatedSnaphotAttributes)
        writeOutput("Snapshot " & snapshotName & " updated succcessfully")
</cfscript>

List snapshots

Syntax
listSnapshots()

Parameters

Parameter	Description
nextPageToken	Retrieve the next page of results and perform the same request.

For Example,

<cfscript>
    cred = {
        projectId : "my-gcp-project",
        credentialJsonFilePath : "C:\GCP-keys\my-gcp-project-ab38bee5f1e0.json"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    listResponse=pubsubclient.listSnapshots()
    writeDump(listResponse)
</cfscript>

Delete a snapshot

Syntax
deleteSnapshot(snapshotName)

Parameters

Parameter	Description
snapshotName	Name of the snapshot to be deleted.

For Example,

<cfscript>
        cred = {
		projectId : "my-gcp-project",
		credentialJsonFilePath : "C:\GCP-keys\my-gcp-project-ab38bee5f1e0.json"
	};
	conf = {
		serviceName : "pubsub"
	};
    pubsubclient=getCloudService(cred, conf)
    topicName = "topic-ss-delete"
    // create the topic
    topic = pubsubClient.createTopic(topicName)
    subName="sub-name-ss-delete"
    subscriptionMetadata = {
		"subscriptionName" : subName
	}
    // create the subscription
    topic.subscribe(subscriptionMetadata)
    // create the snapshot
    snapshotName="snshot-delete"
    snapshotAttributes = {
	    snapshotName: snapshotName,
		subscriptionName: subName,
		labels : {
			name : "wrench",
			mass : "13kg",
			createdtime : dateTimeFormat(now(), "hh-nn_mm-dd-yyyy"),
			emptykey : ""
		}
	}
    // create a snapshot
    pubsubClient.createSnapshot(snapshotAttributes)
    // delete the snapshot
        pubsubClient.deleteSnapshot(snapshotName)
        writeOutput("Snapshot deleted successfully")
    </cfscript>

Seek Messages

Once you've acknowledged a message, Pub/Sub cannot recover it. But, occasionally, you could feel the need to replay the acknowledged messages, for instance, if you acknowledged something incorrectly. Then you may utilize the Seek feature to mark previously accepted communications as unacknowledged and cause Pub/Sub to redeliver those messages. By setting their status to acknowledged, you can also utilize seek to delete unacknowledged messages.

You can only seek messages either using snapshotName or timestamp. You cannot use both.

Syntax
seekMessages(requestParameters)

Parameters

Parameter	Description	Required
snapshotName	Name of the snapshot.	Yes
subscriptionName	Name of the subscription.	Yes
timeStamp	Timestamp of the snapshot.	No

For Example,

<cfscript>
    cred = {
        projectId : "adbe-gcp0318",
        credentialJsonFilePath : "C:\GCP-keys\adbe-gcp0318-ab38bee5f1e0.json"
    };
    conf = {
        serviceName : "pubsub"
    };
    pubSubClient=getCloudService(cred,conf)
    // set names
    topicName = "topic-ss-seek"
    subName = "sub_ss";
    snapshotName="snapshot_ss"
    // create a topic
    topic = pubsubClient.createTopic(topicName)
    subscriptionMetadata = {
"subscriptionName" : "#subName#",
"topicName" : "#topicName#"
}
    // subscribe to the topic
    subscription = topic.subscribe(subscriptionMetadata)	
    // create a snapshot
    snapshot = pubsubClient.createSnapshot({
snapshotName: snapshotName,
subscriptionName:  subName
})
    writeOutput("seeking to snapshot.. replaying msgs.<hr>")
    snapshotID=snapshot.getID()
seekAttributes = {
subName,
snapshotID
}
seekResponse = pubsubClient.seekMessages(seekAttributes)
    writeDump(seekAttributes)
</cfscript>

Snapshot object methods

String getId()
String getName()
String getTopic()
OleDateTime getExpireTime()
boolean hasExpireTime()
boolean containsLabels(String key)
Struct getLabels()
void setLabels(Struct labels)
void addLabels(Struct labels)
Struct delete()
Struct getIAMPolicy(Struct policyStruct)
Struct setIAMPolicy(Struct policyStruct)
Struct addIAMPolicy(Struct policyStruct)
Struct testIAMPermissions(Struct permissionsStruct)

Security APIs

GCP PubSub uses Identity and Access Management to control access. You can enforce access control on both project and resource levels. For more information, see Access control.

Add IAM policy

Syntax
setIAMolicy(subscriptionPolicyMetadata)

Parameters

Parameter	Description
resourceName	Name of the subscription.
resourceType	Valid values are: Subscription
bindings	Specify the role and email of the members who can add an IAM policy. Valid values for role are: roles/viewer admin

For Example,

<cfscript>
    cred = {
		projectId : "my-gcp-project",
		credentialJsonFilePath : "C:\GCP-keys\my-gcp-project-ab38bee5f1e0.json"
	};
	conf = {
		serviceName : "pubsub"
	};
    pubsubclient=getCloudService(cred, conf)
    topicName="topic-add-iam"
    // create the topic
    topic = pubsubClient.createTopic(topicName)
    // create the subscription
    subName="sub-add-iam"
    subscriptionMetadata = {
		"subscriptionName" : subName
	}
    topic.subscribe(subscriptionMetadata)
    // add IAM Policy
    addIamPolicy = {
			resourceName : subscriptionName,
			resourceType : "Subscription",
			bindings : {
				role : "roles/viewer",
				members : ["user:user@example.com"]
			}
		}
        pubsubClient.addIAMPolicy(addIamPolicy)
        writeOutput("IAM policy added successfully")
    </cfscript>

Set IAM Policy

Syntax

setIAMPolicy(policyStruct)

Parameters

Parameter	Description	Required
subName	Name of the subscription for which IAM policy needs to be set.	Yes

Example

<cfscript>
    this.gcpCred = {
        "vendorName":"GCP",
        "alias": "gcp_cred_alias",
        "projectid": "{ProjectID}"
    }

    this.pubsubConf = {
            "alias":"pubsub_conf_alias",
            "serviceName" : "PUBSUB", 
    }

    pubsub = cloudService(this.gcpCred, this.pubsubConf)


    // Create new role > members binding and update the topic policy
    topicPolicyMetadata = {
            "resource" : "topicName",
            "policy" : "oldPolicy",
            "bindings" : {
                    "role" : "roles/pubsub.editor",
                    "members" : "allUsers",
                    "conditions" : ""
            }
    }
    // set the IAM policy
    pubsub.setIAMPolicy(topicPolicyMetadata)
    // retrieve the IAP policy
    pubsub.getIAMPolicy("topicName") 
</cfscript>

GET IAM Policy

Syntax

getIAMPolicy(policyStruct)

Parameters

Parameter	Description	Required
resourceName	The name of the subscription.	Yes
resourceType	Topic or subscription.	Yes
policyOptions	Struct of options	Yes

Example

<cscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    topicName = "topic-add-policy"
    subscriptionName = "sub-#topicName#"
    topic = pubsubClient.createTopic(topicName)
    subscriptionAttributes = {
        subscriptionName : "#subscriptionName#",
        topicName : "#topicName#"
    }
    subscription = topic.subscribe(subscriptionAttributes)
    policyMapV1 = { 
                version = "1",
                resourceName : subscriptionName,
                resourceType : "Subscription",
                binding : [{
                        ROLE : "roles/editor",
                        MEMBERS : ["user:pn@adb.com"]
                    },
                    {
                        ROLE : "roles/owner",
                        MEMBERS : ["user:pn@adb.com"]
                    },
                    {
                        ROLE : "roles/viewer",
                        MEMBERS : ["user:mj@adb.com","user:pn@adb.com"]
                    }]
                }
        setIAMPolicy = pubsubClient.setIAMPolicy(policyMapV1)
        cfdump(var=#setIAMPolicy#, label="set policy")
        iAMPolicy = pubsubClient.getIAMPolicy({
                resourceName : subscriptionName,
                resourceType : "Subscription",
                policyOptions : {   
                    requestedPolicyVersion : policyMapV1[VERSION]
                }
        })
        cfdump(var=#iAMPolicy#, label="get policy")
</cfscript>

Test IAM Permissions

Syntax

testIAMPermissions(parameterStruct)

Parameters

Parameter	Description	Required
resourceName	The name of the subscription.	Yes
resourceType	Topic or subscription.	Yes
permissions	The set of permissions to check for the resource.	Yes

Example

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    topicName = "topic-add-policy"
    subscriptionName = "sub-#topicName#"
    topic = pubsubClient.createTopic(topicName)
    subscriptionAttributes = {
        subscriptionName : "#subscriptionName#",
        topicName : "#topicName#"
    }
    subscription = topic.subscribe(subscriptionAttributes)
    policyMapV1 = { 
                version = "1",
                resourceName : subscriptionName,
                resourceType : "Subscription",
                binding : [{
                        ROLE : "roles/editor",
                        MEMBERS : ["user:pn@example.com"]
                    },
                    {
                        ROLE : "roles/owner",
                        MEMBERS : ["user:pn@example.com"]
                    },
                    {
                        ROLE : "roles/viewer",
                        MEMBERS : ["user:mj@example.com","user:pn@example.com"]
                    }]
                }
        setIAMPolicy = pubsubClient.setIAMPolicy(policyMapV1)
        cfdump(var=#setIAMPolicy#, label="set policy")
        iAMPolicy = pubsubClient.getIAMPolicy({
                resourceName : subscriptionName,
                resourceType : "Subscription",
                policyOptions : {   
                    requestedPolicyVersion : policyMapV1[VERSION]
                }
        })
        cfdump(var=#iAMPolicy#, label="get policy")
        addIamPolicy = {
            resourceName : "#subName#",,
            resourceType : "Subscription",
            bindings : {
                role : "roles/editor",
                members : ["user:mj@adb.com"]
            }
        }
        iAMPolicy = pubsubClient.addIAMPolicy(addIamPolicy);
        cfdump(var=#iAMPolicy#, label="add policy")
        testIAMPermissions = {
            resourceName : "#subName#",
            resourceType : "Subscription",
            permissions : ["pubsub.topics.attachSubscription", "pubsub.topics.publish", "pubsub.topics.update"]
        }
        permissions = pubsubClient.testIAMPermissions(testIAMPermissions);
        WriteDump(permissions);
</cfscript>

Pull messages

Syntax

pullMessages(structMetadata)

Parameters

Parameter	Description	Required
subscriptionName	Name of the subscription.	Yes
maxMessages	The maximum amount of messages to pull.	Yes
returnImmediately	Returns te messages immediately even if the subscription doesn't contain enough messages to satisfy maxMessages.	No

Example

<cfscript>
   cred = {
       projectId : "<your project id>",
       credentialJsonFilePath : "<path to your credentials json file>"
   }
   conf = {
       serviceName : "pubsub"
   }
   pubsubclient = getCloudService(cred, conf)
   topic = pubsubclient.getTopic("myTopic")
   subscription = topic.getSubscription("mySubscription”)
    pullMessageMetadata = {
        maxMessages: 100
    }
    pullMsgResponse = subscription.pullMessages(pullMessageMetadata)
    for(message in pullMsgResponse.messages) {
    WriteOutput(message.ackId)
    WriteOutput(message.messageId)
    WriteOutput(message.data)
    WriteOutput(message.publishTime)
</cfscript>

Acknowledge messages

Syntax

acknowledgeMessages(acknowledgeMetadata)

Parameters

Parameter	Description	Required
subscriptionName	The name of the subscription.	Yes
ackIds	Array of acknowledgement Ids.	Yes

Example

<cfscript>
   cred = {
       projectId : "<your project id>",
       credentialJsonFilePath : "<path to your credentials json file>"
   }
   conf = {
       serviceName : "pubsub"
   }
   pubsubclient = getCloudService(cred, conf)
   topic = pubsubclient.getTopic("myTopic")
   subscription = topic.getSubscription(“mySubscription”)
   pullMessageMetadata = {
        maxMessages: 100
    }
    pullMsgResponse = subscription.pullMessages(pullMessageMetadata)
   ackIds = arrayNew(1)
    for(message in pullMsgResponse.messages) {
       ackId = message.ackId
       ackIds.append(ackId)
        WriteOutput(ackId)
        WriteOutput(message.messageId)
        WriteOutput(message.data)
        WriteOutput(message.publishTime)
    }
   acknowledgeMessageMetadata = {
    ackIds: ackIds
}
    ackMsgResponse = subscription.acknowledgeMessages(acknowledgeMessageMetadata)
    writeDump(ackMsgResponse)
</cfscript>

Modify acknowledgement deadline

Syntax

modifyAckDeadline(ackDeadlineMetadata)

Parameters

Parameter	Required	Description
subscriptionName	The name of the subscription.	Yes
ackIds	Array of acknowledgement Ids.	Yes
ackDeadlineSeconds	The time within which the acknowledgement expires.	Yes

Example

<cfscript>
   cred = {
       projectId : "<your project id>"
       credentialJsonFilePath : "<path to your credentials json file>"
   }
   conf = {
       serviceName : "pubsub"
   }
   pubsubclient = getCloudService(cred, conf)
   topic = pubsubclient.getTopic("myTopic")
   subscription = topic.getSubscription("mySubscription")
    pullMessageMetadata = {
        maxMessages: 100
    }
    pullMsgResponse = subscription.pullMessages(pullMessageMetadata)
   ackIds = arrayNew(1)
    for(message in pullMsgResponse.messages) {
       ackId = message.ackId
       ackIds.append(ackId)
        WriteOutput(ackId)
        WriteOutput(message.messageId)
        WriteOutput(message.data)
        WriteOutput(message.publishTime)
    }
    modifyAckDeadlineMetadata = {
    ackIds: ackIds,
    ackDeadlineSeconds: 80
    }
    WriteDump(subscription.modifyAckDeadline(modifyAckDeadlineMetadata));
    acknowledgeMessageMetadata = {
        ackIds: ackIds
    }
    ackMsgResponse = subscription.acknowledgeMessages(acknowledgeMessageMetadata)
    writeDump(ackMsgResponse)
</cfscript>

Schema management

Create a Schema

Syntax

createSchema(schemaStruct)

Parameters

Parameter	Description	Required
schemaName	The name of the schema for Avro and Protobuf.	Yes
type	The valid values are: Avro or Protobuf.	Yes
definition	The schema definition. You can pass the definition directly.	Yes

Example

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    schemaName = "schemaOne"
    schemaMetadata = {
            schemaName: schemaName,
            type: "protocol_Buffer",
            Definition: 'syntax = "proto2"; message ProtocolBuffer {required string name = 1;}'
        }
    createResponse=pubsubClient.createSchema(schemaMetadata)
    writeDump(createResponse)
</cfscript>

Get a Schema

Syntax

getSchema(schemaName)

Parameter

schemaName: Name of the schema

Example

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    schemaName = "schemaOne"
    schemaMetadata = {
            schemaName: schemaName,
            type: "protocol_Buffer",
            Definition: 'syntax = "proto2"; message ProtocolBuffer {required string name = 1;}'
        }
    createResponse=pubsubClient.createSchema(schemaMetadata)
    createResponse=pubsubClient.createSchema(schemaMetadata)
    writeDump(createResponse)
    schema = pubsubClient.getSchema(schemaName)
    writeOutput("schema ID: " & schema.getID() & "<br>")
    writeOutput("schema Name: " & schema.getName() & "<br>")
    writeOutput("schema type: " & schema.getType() & "<br>")
    writeOutput("schema Definition: " & schema.getDefinition() & "<br>")
</cfscript>

List all schemas in the project

Syntax

listSchemas()

listSchemas(parameterStruct)

Parameters

Parameter	Description	Required
pageSize	Number of schemas to be displayed.	Yes
nextPageToken	Token used to access the next page of this result.	Yes
schemaView	Valid values are: Full or Basic	Yes

Example

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    schemaName = "schemaOne"
    schemaMetadata = {
            schemaName: schemaName,
            type: "protocol_Buffer",
            Definition: 'syntax = "proto2"; message ProtocolBuffer {required string name = 1;}'
        }
    pubsubClient.createSchema(schemaMetadata)
    schema = pubsubClient.getSchema(schemaName)
    first2schemas = pubsubClient.listSchemas({
        pageSize: 2,
        schemaView : "full"
    })
    writeDump(first2schemas)
</cfscript>

Delete a schema

Syntax

deleteSchema(schemaName)

Parameter

schemaName: Name of the schema

Example

<cfscript>
    cred = {
        projectId : "<your project id>",
        credentialJsonFilePath : "<path to your credentials json file>"
    }
    conf = {
        serviceName : "pubsub"
    }
    pubsubclient=getCloudService(cred, conf)
    schemaName = "schemaOne"
    schemaMetadata = {
            schemaName: schemaName,
            type: "protocol_Buffer",
            Definition: 'syntax = "proto2"; message ProtocolBuffer {required string name = 1;}'
        }
    pubsubClient.createSchema(schemaMetadata)
    deleteResponse=pubsubClient.deleteSchema(schemaName)
    writeDump(deleteResponse)
</cfscript>

Validate a schema

Syntax

validateSchema(schemaMetadata)

Parameters

Parameter	Description	Required
schemaName	The name of the schema.	Yes
type	AVRO or Protobuf	Yes
definition	The schema definition.	Yes

Example

<cfscript>
   cred = {
       projectId : "<your project id>",
       credentialJsonFilePath : "<path to your credentials json file>"
   }
   conf = {
       serviceName : "pubsub"
   }
   pubsubclient = getCloudService(cred, conf)
    schemaMetadata = {
        schemaName: "mySchema",
        type: “AVRO”,
    definition: ‘{
           "type" : "record",
           "name" : "Avro",
           "fields" : [ {
               "name" : "StringField”,
               "type" : “string”
           }, {
               "name" : "IntField",
               "type" : "int"
           } ]
       }’
    }
    schema = pubsubclient.validateSchema(schemaMetadata);
    WriteDump(schema);
</cfscript>

Validate a message

Syntax

validateMessage(validateMetadata)

Parameters

Parameter	Description	Required
schemaName	The name of the schema.	Yes
schemaEncoding	JSON or Binary	Yes
data	The data to validate.	Yes

Example

<cfscript>
   cred = {
       projectId : "<your project id>",
       credentialJsonFilePath : "<path to your credentials json file>"
   }
   conf = {
       serviceName : "pubsub"
   }
   pubsubclient = getCloudService(cred, conf)
    validateMessageMetadata = {
        schemaName: "mySchema",
        schemaEncoding: "JSON",
        data: ‘{ "name" : "charlie"}’
    }
    schema = pubsubclient.validateMessage(validateMessageMetadata);
    WriteDump(schema);
</cfscript>

Schema object methods

createSchema(struct)
deleteSchema(string)
getSchema(string)
getSchema(string, string)
listSchemas()
listSchemas(struct)
validateSchema(struct)

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