org.springframework.data.redis.connection.lettuce.LettuceTestClientResources.java Source code

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Here is the source code for org.springframework.data.redis.connection.lettuce.LettuceTestClientResources.java

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/*
 * Copyright 2016-2019 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.redis.connection.lettuce;

import io.lettuce.core.resource.ClientResources;
import io.lettuce.core.resource.DefaultClientResources;

import java.util.concurrent.TimeUnit;

/**
 * Client-Resources suitable for testing. Uses {@link TestEventLoopGroupProvider} to preserve the event loop groups
 * between tests. Every time a new {@link LettuceTestClientResources} instance is created, a
 * {@link Runtime#addShutdownHook(Thread) shutdown hook} is added to close the client resources.
 *
 * @author Mark Paluch
 * @author Christoph Strobl
 */
public class LettuceTestClientResources {

    private static final ClientResources SHARED_CLIENT_RESOURCES;

    static {

        SHARED_CLIENT_RESOURCES = DefaultClientResources.builder()
                .eventLoopGroupProvider(new TestEventLoopGroupProvider()).build();
        appendShutdownHook();
    }

    private LettuceTestClientResources() {
    }

    private static void appendShutdownHook() {

        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                try {
                    SHARED_CLIENT_RESOURCES.shutdown(0, 0, TimeUnit.MILLISECONDS).get(1, TimeUnit.SECONDS);
                } catch (Exception o_O) {
                    // ignore
                }
            }
        });
    }

    /**
     * @return the client resources.
     */
    public static ClientResources getSharedClientResources() {
        return SHARED_CLIENT_RESOURCES;
    }
}