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* as provided by Sun in the GPL Version 2 section of the License file that
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/*
* AsyncHandlerImpl.java
* $Id: AsyncHandler.java,v 1.13 2007/05/05 05:24:18 tcfujii Exp $
* $Date: 2007/05/05 05:24:18 $
* $Revision: 1.13 $
*/
package com.sun.enterprise.admin.monitor.callflow;
import java.util.List;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ConcurrentLinkedQueue;
import com.sun.enterprise.admin.common.constant.AdminConstants;
/**
* This class asynchronously writes supplied input into a data base. That is,
* a separate asynchronous thread is used to write data to the data base.
*
* The implementation uses a typical producer - consumer model: The data
* produced by application threads is collected in unbounded queue objects;
* an asynchronous thread consumes the data from the queues and writes it out
* to the data base.
*
* @author Ram Jeyaraman, Harpreet Singh
* @date March 21, 2005
*/
class AsyncHandler implements AsyncHandlerIntf {
/** Static fields */
private static final Logger logger =
Logger.getLogger(AdminConstants.kLoggerName);
private static final int WAIT_INTERVALS = 100;
private static final int MAX_BULK_SIZE = 10000;
private static final int BUFFER_COUNT = 6;
private static final String THREAD_NAME = "Callflow AsyncThread";
/** Private fields */
private LinkedBlockingQueue<RequestStartTO> requestStartQ;
private LinkedBlockingQueue<RequestEndTO> requestEndQ;
private LinkedBlockingQueue<MethodStartTO> methodStartQ;
private LinkedBlockingQueue<MethodEndTO> methodEndQ;
private LinkedBlockingQueue<StartTimeTO> startTimeQ;
private LinkedBlockingQueue<EndTimeTO> endTimeQ;
private ConcurrentLinkedQueue<RequestStartTO> requestStartFreeQ;
private ConcurrentLinkedQueue<RequestEndTO> requestEndFreeQ;
private ConcurrentLinkedQueue<MethodStartTO> methodStartFreeQ;
private ConcurrentLinkedQueue<MethodEndTO> methodEndFreeQ;
private ConcurrentLinkedQueue<StartTimeTO> startTimeFreeQ;
private ConcurrentLinkedQueue<EndTimeTO> endTimeFreeQ;
private AsyncThread asyncThread = null;
private boolean enabled = false;
private class AsyncThread extends Thread {
private boolean shutdown;
private int emptyBufferCount;
private DbAccessObject dbAccessObject;
AsyncThread() {
setDaemon(true);
setName(THREAD_NAME);
dbAccessObject = DbAccessObjectImpl.getInstance();
}
void shutdown() {
shutdown = true;
while (emptyBufferCount < BUFFER_COUNT) {
try {
Thread.sleep(WAIT_INTERVALS);
} catch (InterruptedException e) {}
}
}
public void run() {
List<RequestStartTO> rsTransferObjects =
new ArrayList<RequestStartTO>();
List<RequestEndTO> reTransferObjects =
new ArrayList<RequestEndTO>();
List<MethodStartTO> msTransferObjects =
new ArrayList<MethodStartTO>();
List<MethodEndTO> meTransferObjects =
new ArrayList<MethodEndTO>();
List<StartTimeTO> stTransferObjects =
new ArrayList<StartTimeTO>();
List<EndTimeTO> etTransferObjects =
new ArrayList<EndTimeTO>();
while (emptyBufferCount < BUFFER_COUNT) {
// Handle RequestStart
for (int i=0; i<MAX_BULK_SIZE; i++) {
try {
RequestStartTO rsto =
requestStartQ.poll(
WAIT_INTERVALS, TimeUnit.MILLISECONDS);
if (rsto == null) {
break;
}
rsTransferObjects.add(rsto);
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.async_thread_interrupted",
e);
break;
}
}
try {
if (rsTransferObjects.isEmpty()) {
if (shutdown) {
emptyBufferCount++;
}
} else {
dbAccessObject.insert(
rsTransferObjects.toArray(new TransferObject[0]));
}
} catch (Exception e) {
logger.log(
Level.WARNING,
"callflow.async_db_write_failed",
e);
}
requestStartFreeQ.addAll(rsTransferObjects);
rsTransferObjects.clear();
// Handle RequestEnd
for (int i=0; i<MAX_BULK_SIZE; i++) {
try {
RequestEndTO reto =
requestEndQ.poll(
WAIT_INTERVALS, TimeUnit.MILLISECONDS);
if (reto == null) {
break;
}
reTransferObjects.add(reto);
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.async_thread_interrupted",
e);
break;
}
}
try {
if (reTransferObjects.isEmpty()) {
if (shutdown) {
emptyBufferCount++;
}
} else {
dbAccessObject.insert(
reTransferObjects.toArray(new TransferObject[0]));
}
} catch (Exception e) {
logger.log(
Level.WARNING,
"callflow.async_db_write_failed",
e);
}
requestEndFreeQ.addAll(reTransferObjects);
reTransferObjects.clear();
// Handle MethodStart
for (int i=0; i<MAX_BULK_SIZE; i++) {
try {
MethodStartTO msto =
methodStartQ.poll(
WAIT_INTERVALS, TimeUnit.MILLISECONDS);
if (msto == null) {
break;
}
msTransferObjects.add(msto);
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.async_thread_interrupted",
e);
break;
}
}
try {
if (msTransferObjects.isEmpty()) {
if (shutdown) {
emptyBufferCount++;
}
} else {
dbAccessObject.insert(
msTransferObjects.toArray(new TransferObject[0]));
}
} catch (Exception e) {
logger.log(
Level.WARNING,
"callflow.async_db_write_failed",
e);
}
methodStartFreeQ.addAll(msTransferObjects);
msTransferObjects.clear();
// Handle MethodEnd
for (int i=0; i<MAX_BULK_SIZE; i++) {
try {
MethodEndTO meto =
methodEndQ.poll(
WAIT_INTERVALS, TimeUnit.MILLISECONDS);
if (meto == null) {
break;
}
meTransferObjects.add(meto);
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.async_thread_interrupted",
e);
break;
}
}
try {
if (meTransferObjects.isEmpty()) {
if (shutdown) {
emptyBufferCount++;
}
} else {
dbAccessObject.insert(
meTransferObjects.toArray(new TransferObject[0]));
}
} catch (Exception e) {
logger.log(
Level.WARNING,
"callflow.async_db_write_failed",
e);
}
methodEndFreeQ.addAll(meTransferObjects);
meTransferObjects.clear();
// Handle StartTime
for (int i=0; i<MAX_BULK_SIZE; i++) {
try {
StartTimeTO stto =
startTimeQ.poll(
WAIT_INTERVALS, TimeUnit.MILLISECONDS);
if (stto == null) {
break;
}
stTransferObjects.add(stto);
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.async_thread_interrupted",
e);
break;
}
}
try {
if (stTransferObjects.isEmpty()) {
if (shutdown) {
emptyBufferCount++;
}
} else {
dbAccessObject.insert(
stTransferObjects.toArray(new TransferObject[0]));
}
} catch (Exception e) {
logger.log(
Level.WARNING,
"callflow.async_db_write_failed",
e);
}
startTimeFreeQ.addAll(stTransferObjects);
stTransferObjects.clear();
// Handle EndTime
for (int i=0; i<MAX_BULK_SIZE; i++) {
try {
EndTimeTO etto =
endTimeQ.poll(
WAIT_INTERVALS, TimeUnit.MILLISECONDS);
if (etto == null) {
break;
}
etTransferObjects.add(etto);
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.async_thread_interrupted",
e);
break;
}
}
try {
if (etTransferObjects.isEmpty()) {
if (shutdown) {
emptyBufferCount++;
}
} else {
dbAccessObject.insert(
etTransferObjects.toArray(new TransferObject[0]));
}
} catch (Exception e) {
logger.log(
Level.WARNING,
"callflow.async_db_write_failed",
e);
}
endTimeFreeQ.addAll(etTransferObjects);
etTransferObjects.clear();
}
}
}
AsyncHandler() {
requestStartQ = new LinkedBlockingQueue<RequestStartTO>();
requestEndQ = new LinkedBlockingQueue<RequestEndTO>();
methodStartQ = new LinkedBlockingQueue<MethodStartTO>();
methodEndQ = new LinkedBlockingQueue<MethodEndTO>();
startTimeQ = new LinkedBlockingQueue<StartTimeTO>();
endTimeQ = new LinkedBlockingQueue<EndTimeTO>();
requestStartFreeQ = new ConcurrentLinkedQueue<RequestStartTO>();
requestEndFreeQ = new ConcurrentLinkedQueue<RequestEndTO>();
methodStartFreeQ = new ConcurrentLinkedQueue<MethodStartTO>();
methodEndFreeQ = new ConcurrentLinkedQueue<MethodEndTO>();
startTimeFreeQ = new ConcurrentLinkedQueue<StartTimeTO>();
endTimeFreeQ = new ConcurrentLinkedQueue<EndTimeTO>();
asyncThread = new AsyncThread ();
}
public synchronized void enable() {
if (!enabled){
enabled = true;
if (asyncThread == null)
asyncThread = new AsyncThread ();
asyncThread.start();
}
}
public synchronized void disable() {
asyncThread.shutdown();
enabled = false;
asyncThread = null;
}
public void handleRequestStart(
String requestId, long timeStamp, long timeStampMillis,
RequestType requestType, String callerIPAddress,
String remoteUser) {
RequestStartTO rsto = requestStartFreeQ.poll();
if (rsto == null) {
rsto = new RequestStartTO();
}
rsto.setRequestId(requestId);
rsto.setTimeStamp(timeStamp);
rsto.setTimeStampMillis(timeStampMillis);
rsto.setRequestType(requestType);
rsto.setIpAddress(callerIPAddress);
//rsto.setRemoteUser(remoteUser); // not currently in db schema.
boolean success = false;
while (!success) {
try {
requestStartQ.put(rsto);
success = true;
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.transfer_to_async_thread_interrupted", e);
}
}
}
public void handleRequestEnd(String requestId, long timeStamp) {
RequestEndTO reto = requestEndFreeQ.poll();
if (reto == null) {
reto = new RequestEndTO();
}
reto.setRequestId(requestId);
reto.setTimeStamp(timeStamp);
boolean success = false;
while (!success) {
try {
requestEndQ.put(reto);
success = true;
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.transfer_to_async_thread_interrupted", e);
}
}
}
public void handleMethodStart(
String requestId, long timeStamp, String methodName,
ComponentType componentType, String applicationName,
String moduleName, String componentName, String threadId,
String transactionId, String securityId) {
MethodStartTO msto = methodStartFreeQ.poll();
if (msto == null) {
msto = new MethodStartTO();
}
msto.setRequestId(requestId);
msto.setTimeStamp(timeStamp);
msto.setMethodName(methodName);
msto.setComponentType(componentType);
msto.setAppName(applicationName);
msto.setModuleName(moduleName);
msto.setComponentName(componentName);
msto.setThreadId(threadId);
msto.setTransactionId(transactionId);
msto.setSecurityId(securityId);
boolean success = false;
while (!success) {
try {
methodStartQ.put(msto);
success = true;
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.transfer_to_async_thread_interrupted", e);
}
}
}
public void handleMethodEnd(
String requestId, long timeStamp, Throwable exception) {
MethodEndTO meto = methodEndFreeQ.poll();
if (meto == null) {
meto = new MethodEndTO();
}
meto.setRequestId(requestId);
meto.setTimeStamp(timeStamp);
meto.setException(((exception == null) ? null : exception.toString()));
boolean success = false;
while (!success) {
try {
methodEndQ.put(meto);
success = true;
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.transfer_to_async_thread_interrupted", e);
}
}
}
public void handleStartTime(
String requestId, long timeStamp,
ContainerTypeOrApplicationType type) {
StartTimeTO stto = startTimeFreeQ.poll();
if (stto == null) {
stto = new StartTimeTO();
}
stto.setRequestId(requestId);
stto.setTimeStamp(timeStamp);
stto.setContainerTypeOrApplicationType(type);
boolean success = false;
while (!success) {
try {
startTimeQ.put(stto);
success = true;
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.transfer_to_async_thread_interrupted", e);
}
}
}
public void handleEndTime(
String requestId, long timeStamp,
ContainerTypeOrApplicationType type) {
EndTimeTO etto = endTimeFreeQ.poll();
if (etto == null) {
etto = new EndTimeTO();
}
etto.setRequestId(requestId);
etto.setTimeStamp(timeStamp);
etto.setContainerTypeOrApplicationType(type);
boolean success = false;
while (!success) {
try {
endTimeQ.put(etto);
success = true;
} catch (InterruptedException e) {
logger.log(
Level.FINE,
"callflow.transfer_to_async_thread_interrupted", e);
}
}
}
public void flush (){}
}
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