Connector Configuration

Providing Configuration

For information about about how the connector detects configuration properties, see Spring Boot: Externalized Configuration.

Converting Canonical Spring Property Names to Environment Variables

For information about converting the Spring property names to environment variables, see the Spring documentation.

Spring Profiles

If multiple configuration files exist within the same configuration directory for use in different environments (development, production, etc.), use Spring profiles.

Using Spring profiles allow you to define different application property files under the same directory using the filename format, application-{profile}.yml.

For example:

application.yml: The properties in non-specific files that always apply. Its properties are overridden by the properties defined in profile-specific files.
application-dev.yml: Defines properties specific to the development environment.
application-prod.yml: Defines properties specific to the production environment.

Individual profiles can then be enabled by setting the spring.profiles.active property. See Spring Boot: Profile-Specific Files for more information and an example.

Configuring Locations to Find Spring Property Files

By default, the connector detects any Spring property files as described in the Spring Boot’s default locations.

If you want to add additional locations, add --spring.config.additional-location=file:<custom-config-dir>.
If you want to exclusively use the locations that you’ve defined and ignore Spring Boot’s default locations, add --spring.config.location=optional:classpath:/,optional:classpath:/config/,file:<custom-config-dir>.

For example of the command to add additional locations, see Quick Start: Running the Connector Using the Command Line.

For more information about configuring locations to find Sprint property files, see Spring Boot documentation.

If you want configuration files for multiple, different connectors within the same config directory for use in different environments (such as, development, production, etc.), we recommend that you use Spring Boot Profiles instead of child directories. For example:

Set up your configuration like this:
- config/application-prod.yml
- config/application-dev.yml
Do not do this:
- config/prod/application.yml
- config/dev/application.yml

Child directories are intended to be used for merging configuration from multiple sources of confiugration properties. For more information and an example of when you might want to use multiple child directories to compose your application’s configuration, see the Spring Boot documentation.

Obtaining Build Information

Build information that includes the version, build date, time, and description is enabled by default using the Spring Boot Actuator Info Endpoint. By default, a connector only shares information related to its build.

The following example shows the structure of the output data:

{
"build": {
"version": "<connector version>",
"artifact": "<connector artifact>",
"name": "<connector name>",
"time": "<connector build time>",
"group": "<connector group>",
"description": "<connector description>",
"support": "<support information>"
}
}

If you want to exclude build data from the output of the info endpoint, set management.info.build.enabled to false.

Alternatively, if you want to disable the info endpoint entirely, you can remove info from the list of endpoints specified in management.endpoints.web.exposure.include.

Spring Configuration Options

This connector packages many libraries for you to customize functionality. Here are some references to get started:

Amazon SQS Binder Configuration Options

The following properties are available at the Amazon SQS binder level.

These properties are to be prefixed with spring.cloud.stream.sqs.bindings.<function name>.consumer. For more information, see SQS Binder configuration.


Config Option	Type	Valid Values	Default Value	Description
`maxMessagesPerPoll`	`int`	1-10	10	The number of messages that are returned per poll.
`visibilityTimeout`	`int`	> 0	30	The duration (in seconds) that polled messages are hidden from subsequent poll requests after having been retrieved.
`pollTimeout`	`int`	1-20	10	The duration (in seconds) that the system waits for new messages to arrive when polling.
`listenerShutdownTimeout`	`int`	> 0	10	The number of seconds that the listener is given to gracefully finish its work on shutdown before interrupting the current thread.
`snsFanout`	`boolean`	`true`or `false`	`false`	It enables the automatic deserialization of incoming SNS-formatted messages. By default, SNS messages are delivered in JSON-format, encapsulating both the message content and various metadata, such as the message ID, timestamp, and the topic ARN. Enabling `snsFanout` allows this connector to automatically parse the JSON structure for extracting and separating the payload message from the metadata. This functionality is particularly beneficial for applications that consume messages from SNS topics that are forwarded to SQS queues because it streamlines the handling of such messages.
`consumer.concurrency`	`int`	> 0	1	The number of concurrent threads to launch. By specifying a value, you launch concurrent threads that continuously poll for the `maxMessagesPerPoll` per thread. Threads asynchronously process all messages. Each thread must complete the processing of its batch of messages prior to retrieving more messages. If the duration for message processing is highly variable from message to message, we recommend to set a lower value for the `maxMessagesPerPoll`, and a higher value for `consumer.concurrency`. Using this parameter increases the number of API calls made to theAmazon SQS queue, which may increase the its cost. For more information, see Amazon SQS Pricing.

Only set snsFanOut to true (enable) if all incoming messages are SNS-formatted messages. If you set snsFanout property to true, the connector deserializes every incoming message as an SNS-formatted message, but if there are messages that are not SNS-formatted, failures occur.

FIFO SQS Queues

To use FIFO SQS queues, you must provide a deduplication of id and a group id. With this binder, you can set these using the message headers sqs_deduplicationId and sqs_groupId. For more information, see FIFO queues configuration.

Connector Configuration Options

The following table lists the configuration options. The following options in Config Option are prefixed with solace.connector.:

Config Option	Type	Valid Values	Default Value	Description
`management.leader- election.fail-over.max-attempts`	`int`	`> 0`	`3`	The maximum number of attempts to perform a fail-over.
`management.leader- election.fail-over.back-off-initial-interval`	`long`	`> 0`	`1000`	The initial interval (milliseconds) to back-off when retrying a fail-over.
`management.leader- election.fail-over.back-off-max-interval`	`long`	`> 0`	`10000`	The maximum interval (milliseconds) to back-off when retrying a fail-over.
`management.leader-election.fail-over.back- off-multiplier`	`double`	`>= 1.0`	`2.0`	The multiplier to apply to the back-off interval between each retry of a fail-over.
`management.leader- election.mode`	`enum`	`(standalone\|active_active\| active_standby)`	`standalone`	The connector’s leader election mode. standalone: A single instance of a connector without any leader election capabilities. active_active: A participant in a cluster of connector instances where all instances are active. active_standby: A participant in a cluster of connector instances where only one instance is active (i.e. the leader), and the others are standby.
`management.queue`	`string`	`any`	`null`	The management queue name.
`management.session.*`		See Spring Boot Auto-Configuration for the Solace Java API		Defines the management session. This has the same interface as that used by `solace.java.*`. See Spring Boot Auto-Configuration for the Solace Java API for more information.
`security.enabled`	`boolean`	`(true\|false)`	`true`	If `true`, security is enabled. Otherwise, anyone has access to the connector’s endpoints.
`security.users[<index>].name`	`string`	any	null	The name of the user.
`security.users[<index>].password`	`string`	any	null	The password for the user.
`security.users[<index>].roles`	`list<string>`	admin	empty list (i.e. read- only)	The list of roles that the specified user has. It has read-only access if no roles are returned.

Workflow Configuration Options

These configuration options are defined under the following prefixes:

solace.connector.workflows.<workflow-id>.: If the options support per-workflow configuration and the default prefixes.
solace.connector.default.workflow.: If the options support default workflow configuration.

Config Option	Applicable Scopes	Type	Valid Values	Default Value	Description
`enabled`	Per-Workflow	`boolean`	`(true\|false)`	`false`	If `true`, the workflow is enabled.
`transform-headers.expressions`	Per-Workflow Default	`Map<string,string>`	Key: A header name. Value: A SpEL string that accepts `headers` as parameters.	`empty map`	A mapping of header names to header value SpEL expressions. The SpEL context contains the headers parameter that can be used to read the input message’s headers.
`acknowledgment.publish-async`	Per- Workflow Default	`boolean`	`(true\|false)`	`false`	If `true`, publisher acknowledgment processing is done asynchronously. The workflow’s consumer and producer bindings must support this mode, otherwise the publisher acknowledgments are processed synchronously regardless of this setting.
`acknowledgment.back- pressure-threshold`	Per-Workflow Default	`int`	`>= 1`	`255`	The maximum number of outstanding messages with unresolved acknowledgments. Message consumption is paused when the threshold is reached to allow for producer acknowledgments to catch up.
`acknowledgment.publish-timeout`	Per-Workflow Default	`int`	`>= -1`	`600000`	The maximum amount of time (in milliseconds) to wait for asynchronous publisher acknowledgments before considering a message as failed. A value of `-1` means to wait indefinitely for publisher acknowledgments.

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