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/*******************************************************************************
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright © 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=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*
*******************************************************************************/
package com.att.dmf.mr.resources;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Date;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import com.att.ajsc.filemonitor.AJSCPropertiesMap;
import com.att.dmf.mr.CambriaApiException;
import com.att.dmf.mr.backends.Consumer;
import com.att.dmf.mr.beans.DMaaPContext;
import com.att.dmf.mr.constants.CambriaConstants;
import com.att.dmf.mr.metabroker.Topic;
import com.att.dmf.mr.utils.DMaaPResponseBuilder.StreamWriter;
import com.att.dmf.mr.utils.Utils;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
/*import com.att.sa.highlandPark.config.HpConfigContext;
import com.att.sa.highlandPark.config.HpReaderException;
import com.att.sa.highlandPark.events.HpJsonEvent;
import com.att.sa.highlandPark.events.HpJsonEventFactory;
import com.att.sa.highlandPark.processor.HpAlarmFilter;
import com.att.sa.highlandPark.processor.HpEvent;
import com.att.sa.highlandPark.processor.HpProcessingEngine;
import com.att.sa.highlandPark.processor.HpProcessingEngine.EventFactory;
*/
/**
* class used to write the consumed messages
*
* @author anowarul.islam
*
*/
public class CambriaOutboundEventStream implements StreamWriter {
private static final int kTopLimit = 1024 * 4;
/**
*
* static innerclass it takes all the input parameter for kafka consumer
* like limit, timeout, meta, pretty
*
* @author anowarul.islam
*
*/
public static class Builder {
// Required
private final Consumer fConsumer;
// private final rrNvReadable fSettings; // used during write to tweak
// format, decide to explicitly
// close stream or not
// Optional
private int fLimit;
private int fTimeoutMs;
private String fTopicFilter;
private boolean fPretty;
private boolean fWithMeta;
ArrayList<Consumer> fKafkaConsumerList;
/**
* constructor it initializes all the consumer parameters
*
* @param c
* @param settings
*/
public Builder(Consumer c) {
this.fConsumer = c;
fLimit = CambriaConstants.kNoTimeout;
fTimeoutMs = CambriaConstants.kNoLimit;
fTopicFilter = CambriaConstants.kNoFilter;
fPretty = false;
fWithMeta = false;
// fOffset = CambriaEvents.kNextOffset;
}
/**
*
* constructor initializes with limit
*
* @param l
* only l no of messages will be consumed
* @return
*/
public Builder limit(int l) {
this.fLimit = l;
return this;
}
/**
* constructor initializes with timeout
*
* @param t
* if there is no message to consume, them DMaaP will wait
* for t time
* @return
*/
public Builder timeout(int t) {
this.fTimeoutMs = t;
return this;
}
/**
* constructor initializes with filter
*
* @param f
* filter
* @return
*/
public Builder filter(String f) {
this.fTopicFilter = f;
return this;
}
/**
* constructor initializes with boolean value pretty
*
* @param p
* messages print in new line
* @return
*/
public Builder pretty(boolean p) {
fPretty = p;
return this;
}
/**
* constructor initializes with boolean value meta
*
* @param withMeta,
* along with messages offset will print
* @return
*/
public Builder withMeta(boolean withMeta) {
fWithMeta = withMeta;
return this;
}
// public Builder atOffset ( int pos )
// {
// fOffset = pos;
// return this;
// }
/**
* method returs object of CambriaOutboundEventStream
*
* @return
* @throws CambriaApiException
*/
public CambriaOutboundEventStream build() throws CambriaApiException {
return new CambriaOutboundEventStream(this);
}
}
@SuppressWarnings("unchecked")
/**
*
* @param builder
* @throws CambriaApiException
*
*/
private CambriaOutboundEventStream(Builder builder) throws CambriaApiException {
fConsumer = builder.fConsumer;
fLimit = builder.fLimit;
fTimeoutMs = builder.fTimeoutMs;
// fSettings = builder.fSettings;
fSent = 0;
fPretty = builder.fPretty;
fWithMeta = builder.fWithMeta;
fKafkaConsumerList = builder.fKafkaConsumerList;
/* if (CambriaConstants.kNoFilter.equals(builder.fTopicFilter)) {
fHpAlarmFilter = null;
fHppe = null;
} else {
try {
final JSONObject filter = new JSONObject(new JSONTokener(builder.fTopicFilter));
HpConfigContext<HpEvent> cc = new HpConfigContext<HpEvent>();
fHpAlarmFilter = cc.create(HpAlarmFilter.class, filter);
final EventFactory<HpJsonEvent> ef = new HpJsonEventFactory();
fHppe = new HpProcessingEngine<HpJsonEvent>(ef);
} catch (HpReaderException e) {
// JSON was okay, but the filter engine says it's bogus
throw new CambriaApiException(HttpServletResponse.SC_BAD_REQUEST,
"Couldn't create filter: " + e.getMessage());
} catch (JSONException e) {
// user sent a bogus JSON object
throw new CambriaApiException(HttpServletResponse.SC_BAD_REQUEST,
"Couldn't parse JSON: " + e.getMessage());
}
}*/
}
/**
*
* interface provides onWait and onMessage methods
*
*/
public interface operation {
/**
* Call thread.sleep
*
* @throws IOException
*/
void onWait() throws IOException;
/**
* provides the output based in the consumer paramter
*
* @param count
* @param msg
* @throws IOException
*/
// void onMessage(int count, Message msg) throws IOException;
void onMessage(int count, String msg, String transId, long offSet) throws IOException, JSONException;
}
/**
*
* @return
*/
public int getSentCount() {
return fSent;
}
@Override
/**
*
* @param os
* throws IOException
*/
public void write(final OutputStream os) throws IOException {
// final boolean transactionEnabled = topic.isTransactionEnabled();
// final boolean transactionEnabled = isTransEnabled();
// final boolean transactionEnabled = istransEnable;
// synchronized(this){
os.write('[');
fSent = forEachMessage(new operation() {
@Override
public void onMessage(int count, String msg, String transId, long offSet)
throws IOException, JSONException {
if (count > 0) {
os.write(',');
}
if (fWithMeta) {
final JSONObject entry = new JSONObject();
entry.put("offset", offSet);
entry.put("message", msg);
os.write(entry.toString().getBytes());
} else {
// os.write(message.getBytes());
String jsonString = JSONObject.valueToString(msg);
os.write(jsonString.getBytes());
}
if (fPretty) {
os.write('\n');
}
String metricTopicname = com.att.ajsc.filemonitor.AJSCPropertiesMap
.getProperty(CambriaConstants.msgRtr_prop, "metrics.send.cambria.topic");
if (null == metricTopicname)
metricTopicname = "msgrtr.apinode.metrics.dmaap";
if (!metricTopicname.equalsIgnoreCase(topic.getName())) {
try {
if (istransEnable && istransType) {
// final String transactionId =
// jsonMessage.getString("transactionId");
// responseTransactionId = transId;
StringBuilder consumerInfo = new StringBuilder();
if (null != dmaapContext && null != dmaapContext.getRequest()) {
final HttpServletRequest request = dmaapContext.getRequest();
consumerInfo.append("consumerIp= \"" + request.getRemoteHost() + "\",");
consumerInfo.append("consServerIp= \"" + request.getLocalAddr() + "\",");
consumerInfo.append("consumerId= \"" + Utils.getUserApiKey(request) + "\",");
consumerInfo.append("consumerGroup= \""
+ getConsumerGroupFromRequest(request.getRequestURI()) + "\",");
consumerInfo.append("consumeTime= \"" + Utils.getFormattedDate(new Date()) + "\",");
}
log.info("Consumer [" + consumerInfo.toString() + "transactionId= \"" + transId
+ "\",messageLength= \"" + msg.length() + "\",topic= \"" + topic.getName() + "\"]");
}
} catch (Exception e) {
}
}
}
@Override
/**
*
* It makes thread to wait
*
* @throws IOException
*/
public void onWait() throws IOException {
os.flush(); // likely totally unnecessary for a network socket
try {
// FIXME: would be good to wait/signal
Thread.sleep(100);
} catch (InterruptedException e) {
// ignore
}
}
});
// if (null != dmaapContext && isTransactionEnabled()) {
if (null != dmaapContext && istransEnable && istransType) {
dmaapContext.getResponse().setHeader("transactionId",
Utils.getResponseTransactionId(responseTransactionId));
}
os.write(']');
os.flush();
boolean close_out_stream = true;
String strclose_out_stream = AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "close.output.stream");
if (null != strclose_out_stream)
close_out_stream = Boolean.parseBoolean(strclose_out_stream);
// if (fSettings.getBoolean("close.output.stream", true)) {
if (close_out_stream) {
os.close();
// }
}
}
/**
*
* @param requestURI
* @return
*/
private String getConsumerGroupFromRequest(String requestURI) {
if (null != requestURI && !requestURI.isEmpty()) {
String consumerDetails = requestURI.substring(requestURI.indexOf("events/") + 7);
int startIndex = consumerDetails.indexOf("/") + 1;
int endIndex = consumerDetails.lastIndexOf("/");
return consumerDetails.substring(startIndex, endIndex);
}
return null;
}
/**
*
* @param op
* @return
* @throws IOException
* @throws JSONException
*/
public int forEachMessage(operation op) throws IOException, JSONException {
final int effectiveLimit = (fLimit == 0 ? kTopLimit : fLimit);
int count = 0;
boolean firstPing = true;
// boolean isTransType=false;
final long startMs = System.currentTimeMillis();
final long timeoutMs = fTimeoutMs + startMs -500; //500 ms used in poll
while (firstPing || (count == 0 && System.currentTimeMillis() < timeoutMs)) {
if (!firstPing) {
op.onWait();
}
firstPing = false;
Consumer.Message msgRecord = null;
while (count < effectiveLimit && (msgRecord =
fConsumer.nextMessage()) != null) {
String message = "";
String transactionid = "";
try {
// String msgRecord = msg;
JSONObject jsonMessage = new JSONObject(msgRecord);
String[] keys = JSONObject.getNames(jsonMessage);
boolean wrapheader1 = false;
boolean wrapheader2 = false;
boolean found_attr3 = false;
String wrapElement1 = "message";
String wrapElement2 = "msgWrapMR";
String transIdElement = "transactionId";
if (null != keys) {
for (String key : keys) {
if (key.equals(wrapElement1)) {
wrapheader1 = true;
} else if (key.equals(wrapElement2)) {
wrapheader2 = true;
} else if (key.equals(transIdElement)) {
found_attr3 = true;
transactionid = jsonMessage.getString(key);
}
}
}
// returns contents of attribute 1 if both attributes
// present, otherwise
// the whole msg
if (wrapheader2 && found_attr3) {
message = jsonMessage.getString(wrapElement2);
} else if (wrapheader1 && found_attr3) {
message = jsonMessage.getString(wrapElement1);
} else {
message = msgRecord.getMessage();
}
// jsonMessage = extractMessage(jsonMessage ,
// "message","msgWrapMR","transactionId");
istransType = true;
} catch (JSONException e) { // This check is required for the
// message sent by MR AAF flow but
// consumed by UEB ACL flow which
// wont expect transaction id in
// cambria client api
// Ignore
log.info("JSON Exception logged when the message is non JSON Format");
} catch (Exception exp) {
log.info("****Some Exception occured for writing messages in topic" + topic.getName()
+ " Exception" + exp);
}
if (message == null || message.equals("")) {
istransType = false;
message = msgRecord.getMessage();
}
// If filters are enabled/set, message should be in JSON format
// for filters to work for
// otherwise filter will automatically ignore message in
// non-json format.
if (filterMatches(message)) {
op.onMessage(count, message, transactionid, msgRecord.getOffset());
count++;
}
}
}
return count;
}
/**
*
* Checks whether filter is initialized
*/
/*private boolean isFilterInitialized() {
return (fHpAlarmFilter != null && fHppe != null);
}
*/
/**
*
* @param msg
* @return
*/
private boolean filterMatches(String msg) {
boolean result = true;
/*if (isFilterInitialized()) {
try {
final HpJsonEvent e = new HpJsonEvent("e", new JSONObject(msg));
result = fHpAlarmFilter.matches(fHppe, e);
} catch (JSONException x) {
// the msg may not be JSON
result = false;
log.error("Failed due to " + x.getMessage());
} catch (Exception x) {
log.error("Error using filter: " + x.getMessage(), x);
}
}*/
return result;
}
public DMaaPContext getDmaapContext() {
return dmaapContext;
}
public void setDmaapContext(DMaaPContext dmaapContext) {
this.dmaapContext = dmaapContext;
}
public Topic getTopic() {
return topic;
}
public void setTopic(Topic topic) {
this.topic = topic;
}
public void setTopicStyle(boolean aaftopic) {
this.isAAFTopic = aaftopic;
}
public void setTransEnabled(boolean transEnable) {
this.istransEnable = transEnable;
}
private final Consumer fConsumer;
private final int fLimit;
private final int fTimeoutMs;
// private final rrNvReadable fSettings;
private final boolean fPretty;
private final boolean fWithMeta;
private int fSent;
// private final HpAlarmFilter<HpJsonEvent> fHpAlarmFilter;
//private final HpProcessingEngine<HpJsonEvent> fHppe;
private DMaaPContext dmaapContext;
private String responseTransactionId;
private Topic topic;
private boolean isAAFTopic = false;
private boolean istransEnable = false;
private ArrayList<Consumer> fKafkaConsumerList;
private boolean istransType = true;
// private static final Logger log =
// Logger.getLogger(CambriaOutboundEventStream.class);
private static final EELFLogger log = EELFManager.getInstance().getLogger(CambriaOutboundEventStream.class);
}
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