// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License. Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
//
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.network.security;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.log4j.Logger;
import com.cloud.agent.AgentManager;
import com.cloud.agent.Listener;
import com.cloud.agent.api.Answer;
public class SecurityGroupWorkTracker {
protected static final Logger s_logger = Logger.getLogger(SecurityGroupWorkTracker.class);
protected AtomicLong _discardCount = new AtomicLong(0);
AgentManager _agentMgr;
Listener _answerListener;
int _bufferLength;
Map<Long, Integer> _unackedMessages = new ConcurrentHashMap<Long, Integer>();
public SecurityGroupWorkTracker(AgentManager agentMgr, Listener answerListener, int bufferLength) {
super();
assert(bufferLength >= 1) : "SecurityGroupWorkTracker: Cannot have a zero length buffer";
this._agentMgr = agentMgr;
this._answerListener = answerListener;
this._bufferLength = bufferLength;
}
public boolean canSend(long agentId) {
int currLength = 0;
synchronized(this) {
Integer outstanding = _unackedMessages.get(agentId);
if (outstanding == null) {
outstanding = new Integer(0);
_unackedMessages.put(new Long(agentId), outstanding);
}
currLength = outstanding.intValue();
if (currLength + 1 > _bufferLength) {
long discarded = _discardCount.incrementAndGet();
//drop it on the floor
s_logger.debug("SecurityGroupManager: dropping a message because there are more than " + currLength +
" outstanding messages, total dropped=" + discarded);
return false;
}
_unackedMessages.put(new Long(agentId), ++currLength);
}
return true;
}
public void handleException(long agentId) {
synchronized(this) {
Integer outstanding = _unackedMessages.get(agentId);
if (outstanding != null && outstanding != 0 ) {
_unackedMessages.put(agentId, --outstanding);
}
}
}
public void processAnswers(long agentId, long seq, Answer[] answers) {
synchronized(this) {
Integer outstanding = _unackedMessages.get(agentId);
if (outstanding != null && outstanding != 0 ) {
_unackedMessages.put(agentId, --outstanding);
}
}
}
public void processTimeout(long agentId, long seq) {
synchronized(this) {
Integer outstanding = _unackedMessages.get(agentId);
if (outstanding != null && outstanding != 0 ) {
_unackedMessages.put(agentId, --outstanding);
}
}
}
public void processDisconnect(long agentId) {
synchronized(this) {
_unackedMessages.put(agentId, 0);
}
}
public void processConnect(long agentId) {
synchronized(this) {
_unackedMessages.put(agentId, 0);
}
}
public long getDiscardCount() {
return _discardCount.get();
}
public int getUnackedCount(long agentId) {
Integer outstanding = _unackedMessages.get(agentId);
if (outstanding == null) {
return 0;
}
return outstanding.intValue();
}
}