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package org.shoal.ha.cache.impl.command;
import org.shoal.ha.cache.api.*;
import org.shoal.ha.cache.impl.interceptor.CommandHandlerInterceptor;
import org.shoal.ha.cache.impl.interceptor.ReplicationCommandTransmitterManager;
import org.shoal.ha.cache.impl.interceptor.ReplicationFramePayloadCommand;
import org.shoal.ha.cache.impl.interceptor.TransmitInterceptor;
import org.shoal.ha.cache.impl.util.MessageReceiver;
import org.shoal.ha.cache.impl.util.ReplicationInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.lang.reflect.Array;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author Mahesh Kannan
*/
public class CommandManager
extends MessageReceiver {
private String myName;
private DataStoreContext dsc;
private Command[] commands = (Command[]) Array.newInstance(Command.class, 256);
private volatile AbstractCommandInterceptor head;
private volatile AbstractCommandInterceptor tail;
private static Logger _logger = Logger.getLogger(ShoalCacheLoggerConstants.CACHE_COMMAND);
private static Logger _statsLogger = Logger.getLogger(ShoalCacheLoggerConstants.CACHE_STATS);
public CommandManager() {}
public void initialize(DataStoreContext dsc) {
this.dsc = dsc;
this.myName = dsc.getInstanceName();
head = new CommandHandlerInterceptor();
head.initialize(dsc);
tail = new TransmitInterceptor();
tail.initialize(dsc);
head.setNext(tail);
tail.setPrev(head);
}
public void registerCommand(Command command) {
commands[command.getOpcode()] = command;
command.initialize(dsc);
}
public synchronized void registerExecutionInterceptor(AbstractCommandInterceptor interceptor) {
interceptor.initialize(dsc);
interceptor.setPrev(tail.getPrev());
tail.getPrev().setNext(interceptor);
interceptor.setNext(tail);
tail.setPrev(interceptor);
}
public void execute(Command cmd)
throws DataStoreException {
executeCommand(cmd, true, myName);
}
public final void executeCommand(Command cmd, boolean forward, String initiator)
throws DataStoreException {
cmd.initialize(dsc);
if (forward) {
try {
head.onTransmit(cmd, initiator);
cmd.onSuccess();
} catch (DataStoreException dseEx) {
cmd.onFailure();
}
} else {
tail.onReceive(cmd, initiator);
}
}
@Override
protected void handleMessage(String sourceMemberName, String token, byte[] messageData) {
ObjectInputStream ois = null;
ByteArrayInputStream bis = null;
try {
bis = new ByteArrayInputStream(messageData);
ois = (dsc.getKeyTransformer() == null)
? new ObjectInputStreamWithLoader(bis, dsc.getClassLoader())
: new ObjectInputStream(bis);
Command cmd = (Command) ois.readObject();
if (_logger.isLoggable(Level.FINER)) {
_logger.log(Level.FINER, dsc.getServiceName() + " RECEIVED " + cmd);
}
cmd.initialize(dsc);
int receivedCount = dsc.getDataStoreMBean().incrementBatchReceivedCount();
if (_statsLogger.isLoggable(Level.FINE)) {
_statsLogger.log(Level.FINE, "Received message# " + receivedCount + " from " + sourceMemberName);
}
this.executeCommand(cmd, false, sourceMemberName);
} catch (IOException dse) {
_logger.log(Level.WARNING, "Error during parsing command: opcode: " + messageData[0], dse);
} catch (Throwable th) {
_logger.log(Level.WARNING, "Error[2] during parsing command: opcode: " + messageData[0], th);
} finally {
try {bis.close();} catch (Exception ex) {_logger.log(Level.FINEST, "Ignorable error while closing ByteArrayInputStream");}
try {ois.close();} catch (Exception ex) {_logger.log(Level.FINEST, "Ignorable error while closing ObjectInputStream");}
}
}
public void close() {
for (AbstractCommandInterceptor h = head; h != null; h = h.getNext()) {
h.close();
}
}
}
