/**
* This method handles submitting and then waiting for the request from the server. It uses the
* ClientRequest API to actually write the request and then read back the response. This
* implementation will block for a response from the server.
*
* @param <T> Return type
* @param clientRequest ClientRequest implementation used to write the request and read the
* response
* @param operationName Simple string representing the type of request
* @return Data returned by the individual requests
*/
private <T> void requestAsync(
ClientRequest<T> delegate,
NonblockingStoreCallback callback,
long timeoutMs,
String operationName) {
ClientRequestExecutor clientRequestExecutor = null;
try {
clientRequestExecutor = pool.checkout(destination);
} catch (Exception e) {
// If we can't check out a socket from the pool, we'll usually get
// either an IOException (subclass) or an UnreachableStoreException
// error. However, in the case of asynchronous calls, we want the
// error to be reported via our callback, not returned to the caller
// directly.
if (!(e instanceof UnreachableStoreException))
e = new UnreachableStoreException("Failure in " + operationName + ": " + e.getMessage(), e);
try {
callback.requestComplete(e, 0);
} catch (Exception ex) {
if (logger.isEnabledFor(Level.WARN)) logger.warn(ex, ex);
}
return;
}
NonblockingStoreCallbackClientRequest<T> clientRequest =
new NonblockingStoreCallbackClientRequest<T>(delegate, clientRequestExecutor, callback);
clientRequestExecutor.addClientRequest(clientRequest, timeoutMs);
}
/**
* This method handles submitting and then waiting for the request from the server. It uses the
* ClientRequest API to actually write the request and then read back the response. This
* implementation will block for a response from the server.
*
* @param <T> Return type
* @param clientRequest ClientRequest implementation used to write the request and read the
* response
* @param operationName Simple string representing the type of request
* @return Data returned by the individual requests
*/
private <T> T request(ClientRequest<T> delegate, String operationName) {
ClientRequestExecutor clientRequestExecutor = pool.checkout(destination);
try {
BlockingClientRequest<T> blockingClientRequest =
new BlockingClientRequest<T>(delegate, timeoutMs);
clientRequestExecutor.addClientRequest(blockingClientRequest, timeoutMs);
blockingClientRequest.await();
return blockingClientRequest.getResult();
} catch (InterruptedException e) {
throw new UnreachableStoreException(
"Failure in " + operationName + " on " + destination + ": " + e.getMessage(), e);
} catch (IOException e) {
clientRequestExecutor.close();
throw new UnreachableStoreException(
"Failure in " + operationName + " on " + destination + ": " + e.getMessage(), e);
} finally {
pool.checkin(destination, clientRequestExecutor);
}
}
/**
* This method handles submitting and then waiting for the request from the server. It uses the
* ClientRequest API to actually write the request and then read back the response. This
* implementation will block for a response from the server.
*
* @param <T> Return type
* @param clientRequest ClientRequest implementation used to write the request and read the
* response
* @param operationName Simple string representing the type of request
* @return Data returned by the individual requests
*/
private <T> T request(ClientRequest<T> delegate, String operationName) {
long startTimeMs = -1;
long startTimeNs = -1;
if (logger.isDebugEnabled()) {
startTimeMs = System.currentTimeMillis();
}
ClientRequestExecutor clientRequestExecutor = pool.checkout(destination);
String debugMsgStr = "";
startTimeNs = System.nanoTime();
BlockingClientRequest<T> blockingClientRequest = null;
try {
blockingClientRequest = new BlockingClientRequest<T>(delegate, timeoutMs);
clientRequestExecutor.addClientRequest(
blockingClientRequest, timeoutMs, System.nanoTime() - startTimeNs);
boolean awaitResult = blockingClientRequest.await();
if (awaitResult == false) {
blockingClientRequest.timeOut();
}
if (logger.isDebugEnabled()) debugMsgStr += "success";
return blockingClientRequest.getResult();
} catch (InterruptedException e) {
if (logger.isDebugEnabled()) debugMsgStr += "unreachable: " + e.getMessage();
throw new UnreachableStoreException(
"Failure in " + operationName + " on " + destination + ": " + e.getMessage(), e);
} catch (UnreachableStoreException e) {
clientRequestExecutor.close();
if (logger.isDebugEnabled()) debugMsgStr += "failure: " + e.getMessage();
throw new UnreachableStoreException(
"Failure in " + operationName + " on " + destination + ": " + e.getMessage(),
e.getCause());
} finally {
if (blockingClientRequest != null && !blockingClientRequest.isComplete()) {
// close the executor if we timed out
clientRequestExecutor.close();
}
// Record operation time
long opTimeNs = Utils.elapsedTimeNs(startTimeNs, System.nanoTime());
if (stats != null) {
stats.recordSyncOpTimeNs(destination, opTimeNs);
}
if (logger.isDebugEnabled()) {
logger.debug(
"Sync request end, type: "
+ operationName
+ " requestRef: "
+ System.identityHashCode(delegate)
+ " totalTimeNs: "
+ opTimeNs
+ " start time: "
+ startTimeMs
+ " end time: "
+ System.currentTimeMillis()
+ " client:"
+ clientRequestExecutor.getSocketChannel().socket().getLocalAddress()
+ ":"
+ clientRequestExecutor.getSocketChannel().socket().getLocalPort()
+ " server: "
+ clientRequestExecutor.getSocketChannel().socket().getRemoteSocketAddress()
+ " outcome: "
+ debugMsgStr);
}
pool.checkin(destination, clientRequestExecutor);
}
}
