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/*-
* ============LICENSE_START=======================================================
* openECOMP : SDN-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.northbound.dmaapclient;
import java.io.File;
import java.io.FileInputStream;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DmaapListener {
private static final String DMAAP_LISTENER_PROPERTIES = "dmaap-listener.properties";
private static final String DMAAP_LISTENER_PROPERTIES_DIR = "/opt/sdnc/data/properties";
private static final String SDNC_CONFIG_DIR = "SDNC_CONFIG_DIR";
private static final Logger LOG = LoggerFactory.getLogger(DmaapListener.class);
public static void main(String[] args) {
Properties properties = new Properties();
String propFileName = DMAAP_LISTENER_PROPERTIES;
String propPath = null;
String propDir = System.getenv(SDNC_CONFIG_DIR);
List<SdncDmaapConsumer> consumers = new LinkedList<>();
if (args.length > 0) {
propFileName = args[0];
}
if (propDir == null) {
propDir = DMAAP_LISTENER_PROPERTIES_DIR;
}
if (!propFileName.startsWith("/")) {
propPath = propDir + "/" + propFileName;
}
if (propPath != null) {
properties = loadProperties(propPath, properties);
String subscriptionStr = properties.getProperty("subscriptions");
boolean threadsRunning = false;
LOG.debug("Dmaap subscriptions : " + subscriptionStr);
if (subscriptionStr != null) {
threadsRunning = handleSubscriptions(subscriptionStr, propDir, properties, consumers);
}
while (threadsRunning) {
threadsRunning = updateThreadState(consumers);
if (!threadsRunning) {
break;
}
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
LOG.error(e.getLocalizedMessage(), e);
}
}
LOG.info("No listener threads running - exiting");
}
}
private static boolean updateThreadState(List<SdncDmaapConsumer> consumers) {
boolean threadsRunning = false;
for (SdncDmaapConsumer consumer : consumers) {
if (consumer.isRunning()) {
threadsRunning = true;
}
}
return threadsRunning;
}
static Properties loadProperties(String propPath, Properties properties) {
File propFile = new File(propPath);
if (!propFile.canRead()) {
LOG.error("Cannot read properties file " + propPath);
System.exit(1);
}
try (FileInputStream in = new FileInputStream(propFile)) {
properties.load(in);
} catch (Exception e) {
LOG.error("Caught exception loading properties from " + propPath, e);
System.exit(1);
}
return properties;
}
static boolean handleSubscriptions(String subscriptionStr, String propDir, Properties properties,
List<SdncDmaapConsumer> consumers) {
String[] subscriptions = subscriptionStr.split(";");
for (String subscription1 : subscriptions) {
String[] subscription = subscription1.split(":");
String consumerClassName = subscription[0];
String propertyPath = subscription[1];
LOG.debug(String.format("Handling subscription [%s,%s]", consumerClassName, propertyPath));
if (propertyPath == null) {
LOG.error(String.format("Invalid subscription (%s) property file missing", subscription1));
continue;
}
if (!propertyPath.startsWith("/")) {
propertyPath = propDir + "/" + propertyPath;
}
Class<?> consumerClass = null;
try {
consumerClass = Class.forName(consumerClassName);
} catch (Exception e) {
LOG.error("Could not find DMaap consumer class {}", consumerClassName, e);
}
if (consumerClass != null) {
handleConsumerClass(consumerClass, consumerClassName, propertyPath,
properties, consumers);
}
}
return !consumers.isEmpty();
}
private static boolean handleConsumerClass(Class<?> consumerClass, String consumerClassName, String propertyPath,
Properties properties, List<SdncDmaapConsumer> consumers) {
SdncDmaapConsumer consumer = null;
try {
consumer = (SdncDmaapConsumer) consumerClass.newInstance();
} catch (Exception e) {
LOG.error("Could not create consumer from class " + consumerClassName, e);
}
if (consumer != null) {
LOG.debug(String.format("Initializing consumer %s(%s)", consumerClassName, propertyPath));
consumer.init(properties, propertyPath);
if (consumer.isReady()) {
Thread consumerThread = new Thread(consumer);
consumerThread.start();
consumers.add(consumer);
LOG.info(String.format("Started consumer thread (%s : %s)", consumerClassName,
propertyPath));
return true;
} else {
LOG.debug(String.format("Consumer %s is not ready", consumerClassName));
}
}
return false;
}
}
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