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/*
* Copyright (c) 2008, 2017 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
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());
}
}
