Configuring Connection Details

SolacePubSub+ Connection Details

The Spring Cloud Stream Binder for PubSub+ uses Spring Boot Auto-Configuration for the Solace Java API to configure its session. In the application.yml, this typically is configured as follows:

solace:
  java:
    host: tcp://localhost:55555
    msg-vpn: default
    client-username: default
    client-password: default

For more information and options to configure the PubSub+ session, see Spring Boot Auto-Configuration for the Solace Java API.

Preventing Message Loss when Publishing to Topic-to-Queue Mappings

If the connector is publishing to a topic that is subscribed to by a queue, messages may be lost if they are rejected. For example, if the queue ingress is shutdown.

To prevent message loss, configure the reject-msg-to-sender-on-discard with the including-when-shutdown flag.

Connecting to Multiple Systems

To connect to multiple systems of a same type, use the multiple binder syntax.

For example:

spring: 
  cloud:
    stream: 
      binders:
        
        # 1st solace binder in this example 
	 solace1:
          type: solace 
	   environment: 
	     solace: 
	       java:
        	 host: tcp://localhost:55555
         
	 # 2nd solace binder in this example 
	 solace2:
          type: solace 
          environment: 
            solace: 
	       java:
        	 host: tcp://other-host:55555
        
	 # Required for internal use 
	 undefined:
          type: undefined 
	 bindings:
          input-0:
            destination: <input-destination> 
	     binder: solace1                  
          output-0:
            destination: <output-destination>
            binder: solace1 # Reference 1st solace binder 
	   input-1:
            destination: <input-destination> 
	     binder: solace1        
           output-1:
            destination: <output-destination>
            binder: solace2 # Reference 2nd solace binder

The configuration above defines two binders of type solace, which are then referenced within the bindings.

Each binder above is configured independently under spring.cloud.stream.binders.<bindername>.environment..

When connecting to multiple systems, all binder configuration must be specified using the multiple binder syntax for all binders. For example, under the spring.cloud.stream.binders.<binder-name>.environment.
Do not use single-binder configuration (for example, solace.java.* at the root of your application.yml) while using the multiple binder syntax.

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