org.springframework.integration.mqtt.BrokerRunning.java Source code

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Here is the source code for org.springframework.integration.mqtt.BrokerRunning.java

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/*
 * Copyright 2002-2016 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
 *
 *      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,
 * 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.integration.mqtt;

import static org.junit.Assume.assumeNoException;
import static org.junit.Assume.assumeTrue;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.paho.client.mqttv3.IMqttClient;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.junit.rules.TestWatcher;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;

/**
 * @author Gary Russell
 * @since 4.0
 *
 */
public class BrokerRunning extends TestWatcher {

    private static Log logger = LogFactory.getLog(BrokerRunning.class);

    // Static so that we only test once on failure: speeds up test suite
    private static Map<Integer, Boolean> brokerOnline = new HashMap<Integer, Boolean>();

    private final int port;

    private BrokerRunning(int port) {
        this.port = port;
        brokerOnline.put(port, true);
    }

    @Override
    public Statement apply(Statement base, Description description) {
        assumeTrue(brokerOnline.get(port));
        String url = "tcp://localhost:" + port;
        IMqttClient client = null;
        try {
            client = new DefaultMqttPahoClientFactory().getClientInstance(url,
                    "junit-" + System.currentTimeMillis());
            client.connect();
        } catch (MqttException e) {
            logger.warn("Tests not running because no broker on " + url + ":", e);
            assumeNoException(e);
        } finally {
            if (client != null) {
                try {
                    client.disconnect();
                    client.close();
                } catch (MqttException e) {
                }
            }
        }
        return super.apply(base, description);
    }

    public static BrokerRunning isRunning(int port) {
        return new BrokerRunning(port);
    }
}