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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/*
* Copyright 2013 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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.netty.channel.oio;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.FileRegion;
import io.netty.channel.RecvByteBufAllocator;
import io.netty.util.internal.ObjectUtil;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.Channels;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.NotYetConnectedException;
import java.nio.channels.WritableByteChannel;
/**
* Abstract base class for OIO Channels that are based on streams.
*
* @deprecated use NIO / EPOLL / KQUEUE transport.
*/
@Deprecated
public abstract class OioByteStreamChannel extends AbstractOioByteChannel {
private static final InputStream CLOSED_IN = new InputStream() {
@Override
public int read() {
return -1;
}
};
private static final OutputStream CLOSED_OUT = new OutputStream() {
@Override
public void write(int b) throws IOException {
throw new ClosedChannelException();
}
};
private InputStream is;
private OutputStream os;
private WritableByteChannel outChannel;
/**
* Create a new instance
*
* @param parent the parent {@link Channel} which was used to create this instance. This can be null if the
* {@link} has no parent as it was created by your self.
*/
protected OioByteStreamChannel(Channel parent) {
super(parent);
}
/**
* Activate this instance. After this call {@link #isActive()} will return {@code true}.
*/
protected final void activate(InputStream is, OutputStream os) {
if (this.is != null) {
throw new IllegalStateException("input was set already");
}
if (this.os != null) {
throw new IllegalStateException("output was set already");
}
this.is = ObjectUtil.checkNotNull(is, "is");
this.os = ObjectUtil.checkNotNull(os, "os");
if (readWhenInactive) {
eventLoop().execute(readTask);
readWhenInactive = false;
}
}
@Override
public boolean isActive() {
InputStream is = this.is;
if (is == null || is == CLOSED_IN) {
return false;
}
OutputStream os = this.os;
return !(os == null || os == CLOSED_OUT);
}
@Override
protected int available() {
try {
return is.available();
} catch (IOException ignored) {
return 0;
}
}
@Override
protected int doReadBytes(ByteBuf buf) throws Exception {
final RecvByteBufAllocator.Handle allocHandle = unsafe().recvBufAllocHandle();
allocHandle.attemptedBytesRead(Math.max(1, Math.min(available(), buf.maxWritableBytes())));
return buf.writeBytes(is, allocHandle.attemptedBytesRead());
}
@Override
protected void doWriteBytes(ByteBuf buf) throws Exception {
OutputStream os = this.os;
if (os == null) {
throw new NotYetConnectedException();
}
buf.readBytes(os, buf.readableBytes());
}
@Override
protected void doWriteFileRegion(FileRegion region) throws Exception {
OutputStream os = this.os;
if (os == null) {
throw new NotYetConnectedException();
}
if (outChannel == null) {
outChannel = Channels.newChannel(os);
}
long written = 0;
for (;;) {
long localWritten = region.transferTo(outChannel, written);
if (localWritten == -1) {
checkEOF(region);
return;
}
written += localWritten;
if (written >= region.count()) {
return;
}
}
}
private static void checkEOF(FileRegion region) throws IOException {
if (region.transferred() < region.count()) {
throw new EOFException("Expected to be able to write " + region.count() + " bytes, " +
"but only wrote " + region.transferred());
}
}
@Override
protected void doClose() throws Exception {
InputStream is = this.is;
OutputStream os = this.os;
this.is = CLOSED_IN;
this.os = CLOSED_OUT;
try {
if (is != null) {
is.close();
}
} finally {
if (os != null) {
os.close();
}
}
}
}
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