AMQP1_0 source connector

The AMQP1_0 source connector receives messages from AMQP 1.0 and writes messages to Pulsar topics.

How to get

You can get the AMQP1_0 source connector using one of the following methods.

Use it with Function Worker

Download the NAR package from here.
Build it from the source code.
1. Clone the source code to your machine.
```
git clone https://github.com/streamnative/pulsar-io-amqp-1-0
```
2. Assume that PULSAR_IO_AMQP1_0_HOME is the home directory for the pulsar-io-amqp1_0 repo. Build the connector in the ${PULSAR_IO_AMQP1_0_HOME} directory.
```
mvn clean install -DskipTests
```
  After the connector is successfully built, a NAR package is generated under the target directory.
```
ls pulsar-io-amqp1_0/target
pulsar-io-amqp1_0-2.9.5.4.nar
```

Use it with Function Mesh

Pull the AMQP1_0 connector Docker image from here.

How to configure

Before using the AMQP1_0 source connector, you need to configure it.

You can create a configuration file (JSON or YAML) to set the following properties.

Name	Type	Required	Default	Description
`protocol`	String	true	"amqp"	The AMQP protocol.
`host`	String	true	" " (empty string)	The AMQP service host.
`port`	int	true	5672	The AMQP service port.
`username`	String	false	" " (empty string)	The username used to authenticate to AMQP1_0.
`password`	String	false	" " (empty string)	The password used to authenticate to AMQP1_0.
`queue`	String	false	" " (empty string)	The queue name that messages should be read from or written to.
`topic`	String	false	" " (empty string)	The topic name that messages should be read from or written to.
`onlyTextMessage`	boolean	false	false	If it is set to `true`, the AMQP message type must be set to `TextMessage`. Pulsar consumers can consume the messages with schema ByteBuffer.

Configure it with Function Worker

You can create a configuration file (JSON or YAML) to set the properties as below.

Example

JSON

{
    "tenant": "public",
    "namespace": "default",
    "name": "amqp1_0-source",
    "topicName": "user-op-queue-topic",
    "archive": "connectors/pulsar-io-amqp1_0-2.9.5.4.nar",
    "parallelism": 1,
    "configs": {
        "protocol": "amqp",
        "host": "localhost",
        "port": "5672",
        "username": "guest",
        "password": "guest",
        "queue": "user-op-queue"
    }
}

YAML

    tenant: "public"
    namespace: "default"
    name: "amqp1_0-source"
    topicName: "user-op-queue-topic"
    archive: "connectors/pulsar-io-amqp1_0-2.9.5.4.nar"
    parallelism: 1
    
    configs:
        protocol: "amqp"
        host: "localhost"
        port: "5672"
        username: "guest"
        password: "guest"
        queue: "user-op-queue"

Configure it with Function Mesh

You can submit a CustomResourceDefinitions (CRD) to create an AMQP1_0 source connector. Using CRD makes Function Mesh naturally integrate with the Kubernetes ecosystem. For more information about Pulsar source CRD configurations, see here.

You can define a CRD file (YAML) to set the properties as below.

apiVersion: compute.functionmesh.io/v1alpha1
kind: Source
metadata:
  name: amqp-source-sample
spec:
  image: streamnative/pulsar-io-amqp-1-0:2.9.5.4
  className: org.apache.pulsar.ecosystem.io.amqp.AmqpSource
  replicas: 1
  output:
    topic: persistent://public/default/user-op-queue-topic
    typeClassName: “java.nio.ByteBuffer”
  sourceConfig:
    protocol: "amqp"
    host: "localhost"
    port: "5672"
    username: "guest"
    password: "guest"
    queue: "user-op-queue"
  pulsar:
    pulsarConfig: "test-pulsar-source-config"
  resources:
    limits:
    cpu: "0.2"
    memory: 1.1G
    requests:
    cpu: "0.1"
    memory: 1G
  java:
    jar: connectors/pulsar-io-amqp1_0-2.9.5.4.nar
  clusterName: test-pulsar

How to use

You can use the AMQP1_0 source connector with Function Worker or Function Mesh.

Use it with Function Worker

You can use the AMQP1_0 source connector as a non built-in connector or a built-in connector.

Use it as non built-in connector

If you already have a Pulsar cluster, you can use the AMQP1_0 source connector as a non built-in connector directly.

This example shows how to create an AMQP1_0 source connector on a Pulsar cluster using the command pulsar-admin sources create.

PULSAR_HOME/bin/pulsar-admin sources create \
--name amqp1_0-source \
--archive pulsar-io-amqp1_0-2.9.5.4.nar \
--classname org.apache.pulsar.ecosystem.io.amqp.AmqpSource \
--source-config-file amqp-source-config.yaml

Use it as built-in connector

You can make the AMQP1_0 source connector as a built-in connector and use it on a standalone cluster or on-premises cluster.

Standalone cluster

This example describes how to use the AMQP1_0 source connector to feed data from AMQP and write data to Pulsar topics in standalone mode.

Prepare AMQP service using Solace.

docker run -p:8008:8008 -p:1883:1883 -p:8000:8000 -p:5672:5672 -p:9000:9000 -p:2222:2222 --shm-size=2g --env username_admin_globalaccesslevel=admin --env username_admin_password=admin --name=solace solace/solace-pubsub-standard

Copy the NAR package of the AMQP1_0 source connector to the Pulsar connectors directory.

cp pulsar-io-amqp1_0-2.9.5.4.nar $PULSAR_HOME/connectors/pulsar-io-amqp1_0-2.9.5.4.nar

Start Pulsar in standalone mode.

Input

PULSAR_HOME/bin/pulsar standalone

Output

You can find the similar logs below.

Searching for connectors in /Volumes/other/apache-pulsar-2.8.0-SNAPSHOT/./connectors
Found connector ConnectorDefinition(name=amqp1_0, description=AMQP1_0 source and AMQP1_0 connector, sourceClass=org.apache.pulsar.ecosystem.io.amqp.AmqpSource, sinkClass=org.apache.pulsar.ecosystem.io.amqp.AmqpSink, sourceConfigClass=null, sinkConfigClass=null) from /Volumes/other/apache-pulsar-2.8.0-SNAPSHOT/./connectors/pulsar-io-amqp1_0-2.9.5.4.nar
Searching for functions in /Volumes/other/apache-pulsar-2.8.0-SNAPSHOT/./functions

Create an AMQP1_0 source.

Input

PULSAR_HOME/bin/pulsar-admin sources create \
--source-type amqp1_0 \
--source-config-file amqp-source-config.yaml

Output

"Created successfully"

Verify whether the source is created successfully or not.

Input

PULSAR_HOME/bin/pulsar-admin sources list

Output

[
"amqp1_0-source"
]

Check the source status.

Input

PULSAR_HOME/bin/pulsar-admin sources status --name amqp1_0-source

Output

  {
    "numInstances" : 1,
    "numRunning" : 1,
    "instances" : [ {
    "instanceId" : 0,
    "status" : {
    "running" : true,
    "error" : "",
    "numRestarts" : 0,
    "numReceivedFromSource" : 0,
    "numSystemExceptions" : 0,
    "latestSystemExceptions" : [ ],
    "numSourceExceptions" : 0,
    "latestSourceExceptions" : [ ],
    "numWritten" : 0,
    "lastReceivedTime" : 0,
    "workerId" : "c-standalone-fw-localhost-8080"
    }
    } ]
    }

Consume messages from Pulsar topics.

PULSAR_HOME/bin/pulsar-client consume -s "test" public/default/user-op-queue-topic -n 10

Send messages to AMQP1_0 service using the method sendMessage.

Input

@Test
public void sendMessage() throws Exception {
    ConnectionFactory connectionFactory = new JmsConnectionFactory("amqp://localhost:5672");
    @Cleanup
    Connection connection = connectionFactory.createConnection();
    connection.start();
    JMSProducer producer = connectionFactory.createContext().createProducer();
    producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
    Destination destination = new JmsQueue("user-op-queue");
    for (int i = 0; i < 10; i++) {
        producer.send(destination, "Hello AMQP1_0 - " + i);
    }
}

Check the source status.

Input

PULSAR_HOME/bin/pulsar-admin sources status --name amqp1_0-source

Output

The values of numWritten and lastReceivedTime are changed.

{
    "numInstances" : 1,
    "numRunning" : 1,
    "instances" : [ {
        "instanceId" : 0,
        "status" : {
        "running" : true,
        "error" : "",
        "numRestarts" : 0,
        "numReceivedFromSource" : 10,
        "numSystemExceptions" : 0,
        "latestSystemExceptions" : [ ],
        "numSourceExceptions" : 0,
        "latestSourceExceptions" : [ ],
        "numWritten" : 10,
        "lastReceivedTime" : 1615194014874,
        "workerId" : "c-standalone-fw-localhost-8080"
        }
    } ]
}

Now you can see the Pulsar consumer receives 10 messages. The message contents are not in regular formats since the message contents contain some extra information about TextMessage.

Output

----- got message -----
key:[null], properties:[], content:Sp�ASr�)�x-opt-jms-msg-typeQ�x-opt-jms-destQSs�\
�/ID:67e69637-bd24-4ee1-86b7-be89e5a49b7f:1:1:1-1@�queue://user-op-queue@@@@@@�x?|�)Sw�
                                                                                    text str - 0
...

On-premise cluster

This example explains how to create an AMQP1_0 source connector on an on-premises cluster.

Copy the NAR package of the AMQP1_0 connector to the Pulsar connectors directory.

cp pulsar-io-amqp1_0-2.9.5.4.nar $PULSAR_HOME/connectors/pulsar-io-amqp1_0-2.9.5.4.nar

Reload all built-in connectors.

PULSAR_HOME/bin/pulsar-admin sources reload

Check whether the AMQP1_0 source connector is available on the list or not.
```
PULSAR_HOME/bin/pulsar-admin sources available-sources
```
Create an AMQP1_0 source connector on a Pulsar cluster using the pulsar-admin sources create command.

   PULSAR_HOME/bin/pulsar-admin sources create \
    --source-type amqp1_0 \
    --source-config-file amqp-source-config.yaml \
    --name amqp1_0-source

Use it with Function Mesh

This example demonstrates how to create an AMQP1_0 source connector through Function Mesh.

Prerequisites

Create and connect to a Kubernetes cluster.
Create a Pulsar cluster in the Kubernetes cluster.
Install the Function Mesh Operator and CRD into the Kubernetes cluster.
Prepare AMQP service.

Step

Define the AMQP1_0 source connector with a YAML file and save it as source-sample.yaml.

This example shows how to publish the AMQP1_0 source connector to Function Mesh with a Docker image.

apiVersion: compute.functionmesh.io/v1alpha1
kind: Source
metadata:
name: amqp-source-sample
spec:
image: streamnative/pulsar-io-amqp-1-0:2.9.5.4
className: org.apache.pulsar.ecosystem.io.amqp.AmqpSource
replicas: 1
output:
    topic: persistent://public/default/user-op-queue-topic
    typeClassName: “java.nio.ByteBuffer”
sourceConfig:
    protocol: "amqp"
    host: "localhost"
    port: "5672"
    username: "guest"
    password: "guest"
    queue: "user-op-queue"
pulsar:
    pulsarConfig: "test-pulsar-source-config"
resources:
    limits:
    cpu: "0.2"
    memory: 1.1G
    requests:
    cpu: "0.1"
    memory: 1G
java:
    jar: connectors/pulsar-io-amqp1_0-2.9.5.4.nar
clusterName: test-pulsar

Apply the YAML file to create the AMQP1_0 source connector.

Input

kubectl apply -f  <path-to-source-sample.yaml>

Output

source.compute.functionmesh.io/amqp-source-sample created

Check whether the AMQP1_0 source connector is created successfully.
Input
```
kubectl get all
```
Output
```
NAME                                READY   STATUS      RESTARTS   AGE
pod/amqp-source-sample-0               1/1     Running     0          77s
```
After that, you can produce and consume messages using the AMQP1_0 source connector between Pulsar and AMQP1_0.