13. Endpoint Quick Reference Table

13. Endpoint Quick Reference Table
Prev	Part V. Integration Endpoints	Next

As discussed in the earlier sections, Spring Integration provides a number of endpoints used to interface with external systems, file systems, and others.

For transparent dependency management Spring Integration provides a bill-of-materials POM to be imported into the Maven configuration:

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-bom</artifactId>
            <version>5.1.2.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

To recap:

Inbound channel adapters are used for one-way integration to bring data into the messaging application.
Outbound channel adapters are used for one-way integration to send data out of the messaging application.
Inbound gateways are used for a bidirectional integration flow, where some other system invokes the messaging application and receives a reply.
Outbound Gateways are used for a bidirectional integration flow, where the messaging application invokes some external service or entity and expects a result.

The following table summarizes the various endpoints with quick links to the appropriate chapter.

Table 13.1. Endpoint Quick Reference

Module	Inbound Adapter	Outbound Adapter	Inbound Gateway	Outbound Gateway
AMQP	Section 14.1, “Inbound Channel Adapter”	Section 14.5, “Outbound Channel Adapter”	Section 14.3, “Inbound Gateway”	Section 14.6, “Outbound Gateway”
Events	Section 15.1, “Receiving Spring Application Events”	Section 15.2, “Sending Spring Application Events”	N	N
Feed	Section 16.1, “Feed Inbound Channel Adapter”	N	N	N
File	Section 17.1, “Reading Files” and Section 17.1.8, “'tail’ing Files”	Section 17.2, “Writing files”	N	Section 17.2, “Writing files”
FTP(S)	Section 18.4, “FTP Inbound Channel Adapter”	Section 18.8, “FTP Outbound Channel Adapter”	N	Section 18.9, “FTP Outbound Gateway”
Gemfire	Section 19.1, “Inbound Channel Adapter” and Section 19.2, “Continuous Query Inbound Channel Adapter”	Section 19.3, “Outbound Channel Adapter”	N	N
HTTP	Section 20.3, “HTTP Namespace Support”	Section 20.3, “HTTP Namespace Support”	Section 20.1, “Http Inbound Components”	Section 20.2, “HTTP Outbound Components”
JDBC	Section 21.1, “Inbound Channel Adapter” and Section 21.5.6, “Stored Procedure Inbound Channel Adapter”	Section 21.2, “Outbound Channel Adapter” and Section 21.5.7, “Stored Procedure Outbound Channel Adapter”	N	Section 21.3, “Outbound Gateway” and Section 21.5.8, “Stored Procedure Outbound Gateway”
JMS	Section 23.1, “Inbound Channel Adapter” and Section 23.2, “Message-driven Channel Adapter”	Section 23.3, “Outbound Channel Adapter”	Section 23.4, “Inbound Gateway”	Section 23.5, “Outbound Gateway”
JMX	Section 12.2.1, “Notification-listening Channel Adapter” and Section 12.2.3, “Attribute-polling Channel Adapter” and Section 12.2.4, “Tree-polling Channel Adapter”	Section 12.2.2, “Notification-publishing Channel Adapter” and Section 12.2.5, “Operation-invoking Channel Adapter”	N	Section 12.2.6, “Operation-invoking Outbound Gateway”
JPA	Section 22.5, “Inbound Channel Adapter”	Section 22.6, “Outbound Channel Adapter”	N	Section 22.7.2, “Updating Outbound Gateway” and Section 22.7.5, “Retrieving Outbound Gateway”
Mail	Section 24.2, “Mail-receiving Channel Adapter”	Section 24.1, “Mail-sending Channel Adapter”	N	N
MongoDB	Section 25.3, “MongoDB Inbound Channel Adapter”	Section 25.4, “MongoDB Outbound Channel Adapter”	N	N
MQTT	Section 26.1, “Inbound (Message-driven) Channel Adapter”	Section 26.2, “Outbound Channel Adapter”	N	N
Redis	Section 27.2.2, “Redis Inbound Channel Adapter” and Section 27.2.4, “Redis Queue Inbound Channel Adapter” and Section 27.5, “Redis Store Inbound Channel Adapter”	Section 27.2.3, “Redis Outbound Channel Adapter” and Section 27.2.5, “Redis Queue Outbound Channel Adapter” and Section 27.6, “RedisStore Outbound Channel Adapter”	Section 27.9, “Redis Queue Inbound Gateway”	Section 27.7, “Redis Outbound Command Gateway” and Section 27.8, “Redis Queue Outbound Gateway”
Resource	Section 28.1, “Resource Inbound Channel Adapter”	N	N	N
RMI	N	N	Section 29.2, “Inbound RMI”	Section 29.1, “Outbound RMI”
SFTP	Section 30.6, “SFTP Inbound Channel Adapter”	Section 30.10, “SFTP Outbound Channel Adapter”	N	Section 30.11, “SFTP Outbound Gateway”
STOMP	Section 31.2, “STOMP Inbound Channel Adapter”	Section 31.3, “STOMP Outbound Channel Adapter”	N	N
Stream	Section 32.1, “Reading from Streams”	Section 32.2, “Writing to Streams”	N	N
Syslog	Section 33.1, “Syslog Inbound Channel Adapter”	N	N	N
TCP	Section 34.6, “TCP Adapters”	Section 34.6, “TCP Adapters”	Section 34.7, “TCP Gateways”	Section 34.7, “TCP Gateways”
UDP	Section 34.2, “UDP Adapters”	Section 34.2, “UDP Adapters”	N	N
Web Services	N	N	Section 37.2, “Inbound Web Service Gateways”	Section 37.1, “Outbound Web Service Gateways”
Web Sockets	Section 36.2, “WebSocket Inbound Channel Adapter”	Section 36.3, “WebSocket Outbound Channel Adapter”	N	N
XMPP	Section 39.2, “XMPP Messages” and Section 39.3, “XMPP Presence”	Section 39.2, “XMPP Messages” and Section 39.3, “XMPP Presence”	N	N

In addition, as discussed in Part IV, “Core Messaging”, Spring Integration provides endpoints for interfacing with Plain Old Java Objects (POJOs). As discussed in Section 6.3, “Channel Adapter”, the <int:inbound-channel-adapter> element lets you poll a Java method for data. The <int:outbound-channel-adapter> element lets you send data to a void method. As discussed in Section 10.4, “Messaging Gateways”, the <int:gateway> element lets any Java program invoke a messaging flow. Each of these works without requiring any source-level dependencies on Spring Integration. The equivalent of an outbound gateway in this context is using a service activator (see Section 10.5, “Service Activator”) to invoke a method that returns an Object of some kind.