io.undertow.server.handlers.cache.ResponseCachingSender Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.server.handlers.cache;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import io.undertow.UndertowLogger;
import io.undertow.io.IoCallback;
import io.undertow.io.Sender;
import org.xnio.Buffers;
/**
* @author Stuart Douglas
*/
public class ResponseCachingSender implements Sender {
private final Sender delegate;
private final DirectBufferCache.CacheEntry cacheEntry;
private final long length;
private long written;
public ResponseCachingSender(final Sender delegate, final DirectBufferCache.CacheEntry cacheEntry, final long length) {
this.delegate = delegate;
this.cacheEntry = cacheEntry;
this.length = length;
}
@Override
public void send(final ByteBuffer src, final IoCallback callback) {
ByteBuffer origSrc = src.duplicate();
handleUpdate(origSrc);
delegate.send(src, callback);
}
@Override
public void send(final ByteBuffer[] srcs, final IoCallback callback) {
ByteBuffer[] origSrc = new ByteBuffer[srcs.length];
long total = 0;
for (int i = 0; i < srcs.length; i++) {
origSrc[i] = srcs[i].duplicate();
total += origSrc[i].remaining();
}
handleUpdate(origSrc, total);
delegate.send(srcs, callback);
}
@Override
public void send(final ByteBuffer src) {
ByteBuffer origSrc = src.duplicate();
handleUpdate(origSrc);
delegate.send(src);
}
@Override
public void send(final ByteBuffer[] srcs) {
ByteBuffer[] origSrc = new ByteBuffer[srcs.length];
long total = 0;
for (int i = 0; i < srcs.length; i++) {
origSrc[i] = srcs[i].duplicate();
total += origSrc[i].remaining();
}
handleUpdate(origSrc, total);
delegate.send(srcs);
}
@Override
public void send(final String data, final IoCallback callback) {
handleUpdate(ByteBuffer.wrap(data.getBytes(StandardCharsets.UTF_8)));
delegate.send(data, callback);
}
@Override
public void send(final String data, final Charset charset, final IoCallback callback) {
handleUpdate(ByteBuffer.wrap(data.getBytes(charset)));
delegate.send(data, charset, callback);
}
@Override
public void send(final String data) {
handleUpdate(ByteBuffer.wrap(data.getBytes(StandardCharsets.UTF_8)));
delegate.send(data);
}
@Override
public void send(final String data, final Charset charset) {
handleUpdate(ByteBuffer.wrap(data.getBytes(charset)));
delegate.send(data, charset);
}
@Override
public void transferFrom(FileChannel channel, IoCallback callback) {
// Transfer never caches
delegate.transferFrom(channel, callback);
}
@Override
public void close(final IoCallback callback) {
if (written != length) {
cacheEntry.disable();
cacheEntry.dereference();
}
delegate.close();
}
@Override
public void close() {
if (written != length) {
UndertowLogger.ROOT_LOGGER.contentEntryMismatch(cacheEntry.key(),length, written);
cacheEntry.disable();
cacheEntry.dereference();
}
delegate.close();
}
private void handleUpdate(final ByteBuffer origSrc) {
LimitedBufferSlicePool.PooledByteBuffer[] pooled = cacheEntry.buffers();
ByteBuffer[] buffers = new ByteBuffer[pooled.length];
for (int i = 0; i < buffers.length; i++) {
buffers[i] = pooled[i].getBuffer();
}
written += Buffers.copy(buffers, 0, buffers.length, origSrc);
if (written == length) {
for (ByteBuffer buffer : buffers) {
//prepare buffers for reading
buffer.flip();
}
if(written == cacheEntry.size()) {
cacheEntry.enable();
} else {
UndertowLogger.ROOT_LOGGER.cacheEntryMismatchContent(cacheEntry.key(),cacheEntry.size(), written);
cacheEntry.disable();
cacheEntry.dereference();
}
}
}
private void handleUpdate(final ByteBuffer[] origSrc, long totalWritten) {
LimitedBufferSlicePool.PooledByteBuffer[] pooled = cacheEntry.buffers();
ByteBuffer[] buffers = new ByteBuffer[pooled.length];
for (int i = 0; i < buffers.length; i++) {
buffers[i] = pooled[i].getBuffer();
}
long leftToCopy = totalWritten;
for (int i = 0; i < origSrc.length; ++i) {
ByteBuffer buf = origSrc[i];
if (buf.remaining() > leftToCopy) {
buf.limit((int) (buf.position() + leftToCopy));
}
leftToCopy -= buf.remaining();
Buffers.copy(buffers, 0, buffers.length, buf);
if (leftToCopy == 0) {
break;
}
}
written += totalWritten;
if (written == length) {
for (ByteBuffer buffer : buffers) {
//prepare buffers for reading
buffer.flip();
}
if(cacheEntry.size() == written) {
cacheEntry.enable();
} else {
UndertowLogger.ROOT_LOGGER.cacheEntryMismatchContent(cacheEntry.key(),cacheEntry.size(), written);
cacheEntry.disable();
cacheEntry.dereference();
}
}
}
}