org.apache.flume.RabbitMQUtil.java Source code

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Here is the source code for org.apache.flume.RabbitMQUtil.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more 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, 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.apache.flume;

import java.util.Date;
import java.util.Map;

import org.apache.commons.collections.map.CaseInsensitiveMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Preconditions;
import com.rabbitmq.client.BasicProperties;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class RabbitMQUtil {
    private static final Logger log = LoggerFactory.getLogger(RabbitMQUtil.class);
    static final String PREFIX = "RabbitMQ";

    private static void setTimestamp(Map<String, String> headers, BasicProperties properties) {
        Date date = properties.getTimestamp() == null ? new Date() : properties.getTimestamp();
        Long value = date.getTime();
        headers.put("timestamp", value.toString());
    }

    public static Map<String, String> getHeaders(BasicProperties properties) {
        Preconditions.checkArgument(properties != null, "properties cannot be null.");
        Map<String, String> headers = new CaseInsensitiveMap();
        setTimestamp(headers, properties);

        Map<String, Object> rabbitmqHeaders = properties.getHeaders();

        if (null != rabbitmqHeaders) {
            for (Map.Entry<String, Object> kvp : rabbitmqHeaders.entrySet()) {
                if (!headers.containsKey(kvp.getKey()) && null != kvp.getValue()) {
                    if (log.isInfoEnabled())
                        log.info("header=" + kvp.getKey() + " value=" + kvp.getValue());
                    headers.put(kvp.getKey(), kvp.getValue().toString());
                }
            }
        }

        return headers;
    }

    public static String getQueueName(Context context) {
        return context.getString(RabbitMQConstants.CONFIG_QUEUENAME, "");
        //Preconditions.checkState(queueName!=null, "No queueName specified.");
    }

    public static String getExchangeName(Context context) {
        return context.getString(RabbitMQConstants.CONFIG_EXCHANGENAME, "");
    }

    public static String[] getTopics(Context context) {
        String list = context.getString(RabbitMQConstants.CONFIG_TOPICS, "");

        if (!list.equals("")) {
            return list.split(",");
        }

        return null;
    }

    public static ConnectionFactory getFactory(Context context) {
        Preconditions.checkArgument(context != null, "context cannot be null.");
        ConnectionFactory factory = new ConnectionFactory();

        String hostname = context.getString("hostname");
        Preconditions.checkArgument(hostname != null, "No hostname specified.");
        factory.setHost(hostname);

        int port = context.getInteger(RabbitMQConstants.CONFIG_PORT, -1);

        if (-1 != port) {
            factory.setPort(port);
        }

        String username = context.getString(RabbitMQConstants.CONFIG_USERNAME);

        if (null == username) {
            factory.setUsername(ConnectionFactory.DEFAULT_USER);
        } else {
            factory.setUsername(username);
        }

        String password = context.getString(RabbitMQConstants.CONFIG_PASSWORD);

        if (null == password) {
            factory.setPassword(ConnectionFactory.DEFAULT_PASS);
        } else {
            factory.setPassword(password);
        }

        String virtualHost = context.getString(RabbitMQConstants.CONFIG_VIRTUALHOST);

        if (null != virtualHost) {
            factory.setVirtualHost(virtualHost);
        }

        int connectionTimeout = context.getInteger(RabbitMQConstants.CONFIG_CONNECTIONTIMEOUT, -1);

        if (connectionTimeout > -1) {
            factory.setConnectionTimeout(connectionTimeout);
        }

        //        boolean useSSL = context.getBoolean("usessl", false);
        //        if(useSSL){
        //            factory.useSslProtocol();
        //        }

        return factory;
    }

    public static void close(Connection connection, com.rabbitmq.client.Channel channel) {
        if (null != channel) {
            try {
                channel.close();
            } catch (Exception ex) {
                if (log.isErrorEnabled())
                    log.error("Exception thrown while closing channel", ex);
            }
        }

        if (null != connection) {
            try {
                connection.close();
            } catch (Exception ex) {
                if (log.isErrorEnabled())
                    log.error("Exception thrown while closing connection", ex);
            }
        }
    }
}