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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2008-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* If you wish your version of this file to be governed by only the CDDL or
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* elects to include this software in this distribution under the [CDDL or GPL
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* recipient has the option to distribute your version of this file under
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* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.grizzly;
import org.glassfish.grizzly.utils.Holder;
/**
* Result of read operation, returned by {@link Readable}.
*
* @param type of the message
* @param type of the address
*
* @author Alexey Stashok
*/
public class ReadResult implements Result, Cacheable {
private static final ThreadCache.CachedTypeIndex CACHE_IDX =
ThreadCache.obtainIndex(ReadResult.class, 4);
private boolean isRecycled = false;
public static ReadResult create(Connection connection) {
final ReadResult readResult = takeFromCache();
if (readResult != null) {
readResult.connection = connection;
readResult.isRecycled = false;
return readResult;
}
return new ReadResult(connection);
}
public static ReadResult create(Connection connection,
K message, L srcAddress, int readSize) {
final ReadResult readResult = takeFromCache();
if (readResult != null) {
readResult.connection = connection;
readResult.message = message;
readResult.srcAddressHolder = Holder.staticHolder(srcAddress);
readResult.readSize = readSize;
readResult.isRecycled = false;
return readResult;
}
return new ReadResult(connection, message, srcAddress, readSize);
}
@SuppressWarnings("unchecked")
private static ReadResult takeFromCache() {
return ThreadCache.takeFromCache(CACHE_IDX);
}
/**
* Connection, from which data were read.
*/
private Connection connection;
/**
* message data
*/
private K message;
/**
* Source address.
*/
private Holder srcAddressHolder;
/**
* Number of bytes read.
*/
private int readSize;
protected ReadResult() {
}
protected ReadResult(final Connection connection) {
this(connection, null, null, 0);
}
protected ReadResult(final Connection connection, final K message,
final L srcAddress, final int readSize) {
this.connection = connection;
this.message = message;
this.srcAddressHolder = Holder.staticHolder(srcAddress);
this.readSize = readSize;
}
/**
* Get the {@link Connection} data were read from.
*
* @return the {@link Connection} data were read from.
*/
@Override
public final Connection getConnection() {
checkRecycled();
return connection;
}
/**
* Get the message, which was read.
*
* @return the message, which was read.
*/
public final K getMessage() {
checkRecycled();
return message;
}
/**
* Set the message, which was read.
*
* @param message the message, which was read.
*/
public final void setMessage(K message) {
checkRecycled();
this.message = message;
}
/**
* Get the source address, the message was read from.
*
* @return the source address, the message was read from.
*/
public final L getSrcAddress() {
checkRecycled();
return srcAddressHolder != null ? srcAddressHolder.get() : null;
}
/**
* Get the source address, the message was read from.
*
* @return the source address, the message was read from.
*/
public final Holder getSrcAddressHolder() {
checkRecycled();
return srcAddressHolder;
}
/**
* Set the source address, the message was read from.
*
* @param srcAddress the source address, the message was read from.
*/
public final void setSrcAddress(L srcAddress) {
checkRecycled();
this.srcAddressHolder = Holder.staticHolder(srcAddress);
}
/**
* Set the source address, the message was read from.
*
* @param srcAddressHolder the source address, the message was read from.
*/
public final void setSrcAddressHolder(Holder srcAddressHolder) {
checkRecycled();
this.srcAddressHolder = srcAddressHolder;
}
/**
* Get the number of bytes, which were read.
*
* @return the number of bytes, which were read.
*/
public final int getReadSize() {
checkRecycled();
return readSize;
}
/**
* Set the number of bytes, which were read.
*
* @param readSize the number of bytes, which were read.
*/
public final void setReadSize(int readSize) {
checkRecycled();
this.readSize = readSize;
}
/**
* One method to set all the WriteResult properties.
*
* @param connection
* @param message
* @param srcAddress
* @param readSize
*/
protected void set(final Connection connection, final K message,
final L srcAddress, final int readSize) {
this.connection = connection;
this.message = message;
this.srcAddressHolder = Holder.staticHolder(srcAddress);
this.readSize = readSize;
}
protected void reset() {
connection = null;
message = null;
srcAddressHolder = null;
readSize = 0;
}
private void checkRecycled() {
if (Grizzly.isTrackingThreadCache() && isRecycled)
throw new IllegalStateException("ReadResult has been recycled!");
}
@Override
public void recycle() {
reset();
isRecycled = true;
ThreadCache.putToCache(CACHE_IDX, this);
}
@Override
public Object copy() {
return ReadResult.create(getConnection(), getMessage(),
getSrcAddress(), getReadSize());
}
}
