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/*
* ============LICENSE_START=======================================================
* policy-endpoints
* ================================================================================
* Copyright (C) 2017-2018 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.policy.common.endpoints.event.comm.bus.internal.impl;
import com.att.nsa.mr.client.impl.MRConsumerImpl;
import com.att.nsa.mr.client.response.MRConsumerResponse;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* MR based consumer
*/
public abstract class DmaapConsumerWrapper implements BusConsumer {
/**
* logger
*/
private static Logger logger = LoggerFactory.getLogger(DmaapConsumerWrapper.class);
/**
* Name of the "protocol" property.
*/
protected static final String PROTOCOL_PROP = "Protocol";
/**
* fetch timeout
*/
protected int fetchTimeout;
/**
* close condition
*/
protected Object closeCondition = new Object();
/**
* MR Consumer
*/
protected MRConsumerImpl consumer;
/**
* MR Consumer Wrapper
*
* @param servers messaging bus hosts
* @param topic topic
* @param apiKey API Key
* @param apiSecret API Secret
* @param username AAF Login
* @param password AAF Password
* @param consumerGroup Consumer Group
* @param consumerInstance Consumer Instance
* @param fetchTimeout Fetch Timeout
* @param fetchLimit Fetch Limit
* @throws MalformedURLException
*/
public DmaapConsumerWrapper(List<String> servers, String topic, String apiKey, String apiSecret, String username,
String password, String consumerGroup, String consumerInstance, int fetchTimeout, int fetchLimit)
throws MalformedURLException {
this.fetchTimeout = fetchTimeout;
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException("No topic for DMaaP");
}
this.consumer = new MRConsumerImpl(servers, topic, consumerGroup, consumerInstance, fetchTimeout, fetchLimit,
null, apiKey, apiSecret);
this.consumer.setUsername(username);
this.consumer.setPassword(password);
}
@Override
public Iterable<String> fetch() throws InterruptedException, IOException {
final MRConsumerResponse response = this.consumer.fetchWithReturnConsumerResponse();
if (response == null) {
logger.warn("{}: DMaaP NULL response received", this);
synchronized (closeCondition) {
closeCondition.wait(fetchTimeout);
}
return new ArrayList<>();
} else {
logger.debug("DMaaP consumer received {} : {}" + response.getResponseCode(), response.getResponseMessage());
if (response.getResponseCode() == null || !"200".equals(response.getResponseCode())) {
logger.error("DMaaP consumer received: {} : {}", response.getResponseCode(),
response.getResponseMessage());
synchronized (closeCondition) {
closeCondition.wait(fetchTimeout);
}
/* fall through */
}
}
if (response.getActualMessages() == null) {
return new ArrayList<>();
} else {
return response.getActualMessages();
}
}
@Override
public void close() {
synchronized (closeCondition) {
closeCondition.notifyAll();
}
this.consumer.close();
}
@Override
public String toString() {
return "DmaapConsumerWrapper [" + "consumer.getAuthDate()=" + consumer.getAuthDate()
+ ", consumer.getAuthKey()=" + consumer.getAuthKey() + ", consumer.getHost()=" + consumer.getHost()
+ ", consumer.getProtocolFlag()=" + consumer.getProtocolFlag() + ", consumer.getUsername()="
+ consumer.getUsername() + "]";
}
}
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