org.apache.kafka.connect.rest.ConnectRestExtension Maven / Gradle / Ivy
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* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.kafka.connect.rest;
import org.apache.kafka.common.Configurable;
import org.apache.kafka.connect.components.Versioned;
import org.apache.kafka.connect.health.ConnectClusterState;
import java.io.Closeable;
import java.util.Map;
/**
* A plugin interface to allow registration of new JAX-RS resources like Filters, REST endpoints, providers, etc. The implementations will
* be discovered using the standard Java {@link java.util.ServiceLoader} mechanism by Connect's plugin class loading mechanism.
*
* Kafka Connect discovers implementations of this interface using the Java {@link java.util.ServiceLoader} mechanism.
* To support this, implementations of this interface should also contain a service provider configuration file in
* {@code META-INF/services/org.apache.kafka.connect.rest.ConnectRestExtension}.
*
The extension class(es) must be packaged as a plugin, including the JARs of all dependencies except those
* already provided by the Connect framework.
*
*
To install into a Connect installation, add a directory named for the plugin and containing the plugin's JARs into a directory that is
* on Connect's {@code plugin.path}, and (re)start the Connect worker.
*
*
When the Connect worker process starts up, it will read its configuration and instantiate all of the REST extension implementation
* classes that are specified in the `rest.extension.classes` configuration property. Connect will then pass its configuration to each
* extension via the {@link Configurable#configure(Map)} method, and will then call {@link #register} with a provided context.
*
*
When the Connect worker shuts down, it will call the extension's {@link #close} method to allow the implementation to release all of
* its resources.
*/
public interface ConnectRestExtension extends Configurable, Versioned, Closeable {
/**
* ConnectRestExtension implementations can register custom JAX-RS resources via this method. The Connect framework
* will invoke this method after registering the default Connect resources. If the implementations attempt
* to re-register any of the Connect resources, it will be ignored and will be logged.
*
* @param restPluginContext The context provides access to JAX-RS {@link javax.ws.rs.core.Configurable} and {@link
* ConnectClusterState}.The custom JAX-RS resources can be registered via the {@link
* ConnectRestExtensionContext#configurable()}
*/
void register(ConnectRestExtensionContext restPluginContext);
}