PostgresSQL Event Component

Available as of Camel version 2.15

This is a component for Apache Camel which allows for Producing/Consuming PostgreSQL events related to the LISTEN/NOTIFY commands added since PostgreSQL 8.3.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-pgevent</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

URI format

The pgevent component uses the following two styles of endpoint URI notation:

pgevent:datasource[?parameters]
pgevent://host:port/database/channel[?parameters]

You can append query options to the URI in the following format, ?option=value&option=value&…​

Options

The PostgresSQL Event component has no options.

The PostgresSQL Event endpoint is configured using URI syntax:

pgevent:host:port/database/channel

with the following path and query parameters:

Path Parameters (4 parameters):

Name Description Default Type

host

To connect using hostname and port to the database.

localhost

String

port

To connect using hostname and port to the database.

5432

Integer

database

Required The database name

String

channel

Required The channel name

String

Query Parameters (7 parameters):

Name Description Default Type

datasource (common)

To connect using the given javax.sql.DataSource instead of using hostname and port.

DataSource

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

ExchangePattern

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

pass (security)

Password for login

String

user (security)

Username for login

postgres

String

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-pgevent-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 2 options, which are listed below.

Name Description Default Type

camel.component.pgevent.enabled

Enable pgevent component

true

Boolean

camel.component.pgevent.resolve-property-placeholders

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

Boolean