io.fabric8.mq.core.MQs Maven / Gradle / Ivy
/**
*
* 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 io.fabric8.mq.core;
import io.fabric8.utils.Strings;
import io.fabric8.utils.Systems;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A helper class for working with Fabric8 MQ and Apache ActiveMQ inside Kubernetes
*/
public class MQs {
private static final transient Logger LOG = LoggerFactory.getLogger(MQs.class);
public static final String SERVICE_NAME_ENV_VAR = "FABRIC8MQ_SERVICE_NAME";
public static final String DEFAULT_SERVICE_NAME = "FABRIC8MQ";
public static final String DEFAULT_HOST = "127.0.0.1";
public static final String DEFAULT_PORT = "61616";
/**
* Returns the brokerURL to connect to the Apache ActiveMQ broker using the given Kubernetes service name and an optional parametes string
*/
public static String getBrokerURL(String serviceName, String parameters) {
if (parameters == null) {
parameters = "";
}
if (Strings.isNullOrBlank(serviceName)) {
serviceName = Systems.getEnvVarOrSystemProperty(MQs.SERVICE_NAME_ENV_VAR, MQs.SERVICE_NAME_ENV_VAR, MQs.DEFAULT_SERVICE_NAME);
}
String serviceEnvVarPrefix = getServiceEnvVarPrefix(serviceName);
String hostEnvVar = serviceEnvVarPrefix + "_HOST";
String portEnvVar = serviceEnvVarPrefix + "_PORT";
String host = Systems.getEnvVarOrSystemProperty(hostEnvVar, hostEnvVar, DEFAULT_HOST);
String port = Systems.getEnvVarOrSystemProperty(portEnvVar, portEnvVar, DEFAULT_PORT);
LOG.info("Connecting to ActiveMQ broker on " + host + ":" + port
+ " from $" + hostEnvVar + " and $" + portEnvVar
+ ". To use a different broker service please specify $" + SERVICE_NAME_ENV_VAR + "=someBrokerServiceName where 'someBrokerServiceName' is a defined ActiveMQ broker service in Kubernetes");
String answer = "failover:(tcp://" + host + ":" + port + ")" + parameters;
LOG.info("BrokerURL is: " + answer);
return answer;
}
protected static String getServiceEnvVarPrefix(String serviceName) {
return serviceName.toUpperCase() + "_SERVICE";
}
}