net.rubyeye.xmemcached.command.binary.BinaryStatsCommand Maven / Gradle / Ivy
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Extreme performance modern memcached client for java
/**
*Copyright [2009-2010] [dennis zhuang([email protected])]
*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
*/
/**
*Copyright [2009-2010] [dennis zhuang([email protected])]
*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
*/
package net.rubyeye.xmemcached.command.binary;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import net.rubyeye.xmemcached.command.CommandType;
import net.rubyeye.xmemcached.command.ServerAddressAware;
import net.rubyeye.xmemcached.exception.UnknownCommandException;
import net.rubyeye.xmemcached.transcoders.CachedData;
import net.rubyeye.xmemcached.utils.ByteUtils;
/**
* Stats command for binary protocol
* @author boyan
*
*/
public class BinaryStatsCommand extends BaseBinaryCommand implements
ServerAddressAware {
private InetSocketAddress server;
private String itemName;
private String currentResponseItem;
public String getItemName() {
return this.itemName;
}
public final InetSocketAddress getServer() {
return this.server;
}
public final void setServer(InetSocketAddress server) {
this.server = server;
}
public void setItemName(String item) {
this.itemName = item;
}
public BinaryStatsCommand(InetSocketAddress server, CountDownLatch latch,
String itemName) {
super(null, null, CommandType.STATS, latch, 0, 0, null, false, null);
this.server = server;
this.itemName = itemName;
this.opCode=OpCode.STAT;
this.result = new HashMap();
}
@Override
protected boolean finish() {
// last packet
if (this.currentResponseItem == null) {
return super.finish();
} else {
// continue decode
this.currentResponseItem = null;
return false;
}
}
@Override
protected void readStatus(ByteBuffer buffer) {
ResponseStatus responseStatus = ResponseStatus.parseShort(buffer
.getShort());
if (responseStatus == ResponseStatus.UNKNOWN_COMMAND) {
setException(new UnknownCommandException());
}
}
@Override
protected boolean readKey(ByteBuffer buffer, int keyLength) {
if (buffer.remaining() < keyLength) {
return false;
}
if (keyLength > 0) {
byte[] bytes = new byte[keyLength];
buffer.get(bytes);
this.currentResponseItem = new String(bytes);
}
return true;
}
@Override
@SuppressWarnings("unchecked")
protected boolean readValue(ByteBuffer buffer, int bodyLength,
int keyLength, int extrasLength) {
int valueLength = bodyLength - keyLength - extrasLength;
if (buffer.remaining() < valueLength) {
return false;
}
if (valueLength > 0) {
byte[] bytes = new byte[valueLength];
buffer.get(bytes);
String value = new String(bytes);
((Map) this.result).put(this.currentResponseItem,
value);
}
return true;
}
@Override
protected void fillExtras(CachedData data) {
// must not have extras
}
@Override
protected void fillValue(CachedData data) {
// must not have value
}
@Override
protected byte getExtrasLength() {
return 0;
}
@Override
protected int getValueLength(CachedData data) {
return 0;
}
@Override
protected void fillKey() {
if (this.itemName != null) {
byte[] keyBytes = ByteUtils.getBytes(this.itemName);
this.ioBuffer.put(keyBytes);
}
}
@Override
protected int getKeyLength() {
if (this.itemName != null) {
return this.itemName.length();
} else {
return 0;
}
}
}
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