com.facebook.presto.jdbc.internal.okio.Okio Maven / Gradle / Ivy
/*
* Copyright (C) 2014 Square, Inc.
*
* 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 com.facebook.presto.jdbc.internal.okio;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.nio.file.Files;
import java.nio.file.OpenOption;
import java.nio.file.Path;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.facebook.presto.jdbc.internal.javax.annotation.Nullable;
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
import static com.facebook.presto.jdbc.internal.okio.Util.checkOffsetAndCount;
/** Essential APIs for working with Okio. */
public final class Okio {
static final Logger logger = Logger.getLogger(Okio.class.getName());
private Okio() {
}
/**
* Returns a new source that buffers reads from {@code source}. The returned
* source will perform bulk reads into its in-memory buffer. Use this wherever
* you read a source to get an ergonomic and efficient access to data.
*/
public static BufferedSource buffer(Source source) {
return new RealBufferedSource(source);
}
/**
* Returns a new sink that buffers writes to {@code sink}. The returned sink
* will batch writes to {@code sink}. Use this wherever you write to a sink to
* get an ergonomic and efficient access to data.
*/
public static BufferedSink buffer(Sink sink) {
return new RealBufferedSink(sink);
}
/** Returns a sink that writes to {@code out}. */
public static Sink sink(OutputStream out) {
return sink(out, new Timeout());
}
private static Sink sink(final OutputStream out, final Timeout timeout) {
if (out == null) throw new IllegalArgumentException("out == null");
if (timeout == null) throw new IllegalArgumentException("timeout == null");
return new Sink() {
@Override public void write(Buffer source, long byteCount) throws IOException {
checkOffsetAndCount(source.size, 0, byteCount);
while (byteCount > 0) {
timeout.throwIfReached();
Segment head = source.head;
int toCopy = (int) Math.min(byteCount, head.limit - head.pos);
out.write(head.data, head.pos, toCopy);
head.pos += toCopy;
byteCount -= toCopy;
source.size -= toCopy;
if (head.pos == head.limit) {
source.head = head.pop();
SegmentPool.recycle(head);
}
}
}
@Override public void flush() throws IOException {
out.flush();
}
@Override public void close() throws IOException {
out.close();
}
@Override public Timeout timeout() {
return timeout;
}
@Override public String toString() {
return "sink(" + out + ")";
}
};
}
/**
* Returns a sink that writes to {@code socket}. Prefer this over {@link
* #sink(OutputStream)} because this method honors timeouts. When the socket
* write times out, the socket is asynchronously closed by a watchdog thread.
*/
public static Sink sink(Socket socket) throws IOException {
if (socket == null) throw new IllegalArgumentException("socket == null");
AsyncTimeout timeout = timeout(socket);
Sink sink = sink(socket.getOutputStream(), timeout);
return timeout.sink(sink);
}
/** Returns a source that reads from {@code in}. */
public static Source source(InputStream in) {
return source(in, new Timeout());
}
private static Source source(final InputStream in, final Timeout timeout) {
if (in == null) throw new IllegalArgumentException("in == null");
if (timeout == null) throw new IllegalArgumentException("timeout == null");
return new Source() {
@Override public long read(Buffer sink, long byteCount) throws IOException {
if (byteCount < 0) throw new IllegalArgumentException("byteCount < 0: " + byteCount);
if (byteCount == 0) return 0;
try {
timeout.throwIfReached();
Segment tail = sink.writableSegment(1);
int maxToCopy = (int) Math.min(byteCount, Segment.SIZE - tail.limit);
int bytesRead = in.read(tail.data, tail.limit, maxToCopy);
if (bytesRead == -1) return -1;
tail.limit += bytesRead;
sink.size += bytesRead;
return bytesRead;
} catch (AssertionError e) {
if (isAndroidGetsocknameError(e)) throw new IOException(e);
throw e;
}
}
@Override public void close() throws IOException {
in.close();
}
@Override public Timeout timeout() {
return timeout;
}
@Override public String toString() {
return "source(" + in + ")";
}
};
}
/** Returns a source that reads from {@code file}. */
public static Source source(File file) throws FileNotFoundException {
if (file == null) throw new IllegalArgumentException("file == null");
return source(new FileInputStream(file));
}
/** Returns a source that reads from {@code path}. */
@IgnoreJRERequirement // Should only be invoked on Java 7+.
public static Source source(Path path, OpenOption... options) throws IOException {
if (path == null) throw new IllegalArgumentException("path == null");
return source(Files.newInputStream(path, options));
}
/** Returns a sink that writes to {@code file}. */
public static Sink sink(File file) throws FileNotFoundException {
if (file == null) throw new IllegalArgumentException("file == null");
return sink(new FileOutputStream(file));
}
/** Returns a sink that appends to {@code file}. */
public static Sink appendingSink(File file) throws FileNotFoundException {
if (file == null) throw new IllegalArgumentException("file == null");
return sink(new FileOutputStream(file, true));
}
/** Returns a sink that writes to {@code path}. */
@IgnoreJRERequirement // Should only be invoked on Java 7+.
public static Sink sink(Path path, OpenOption... options) throws IOException {
if (path == null) throw new IllegalArgumentException("path == null");
return sink(Files.newOutputStream(path, options));
}
/** Returns a sink that writes nowhere. */
public static Sink blackhole() {
return new Sink() {
@Override public void write(Buffer source, long byteCount) throws IOException {
source.skip(byteCount);
}
@Override public void flush() throws IOException {
}
@Override public Timeout timeout() {
return Timeout.NONE;
}
@Override public void close() throws IOException {
}
};
}
/**
* Returns a source that reads from {@code socket}. Prefer this over {@link
* #source(InputStream)} because this method honors timeouts. When the socket
* read times out, the socket is asynchronously closed by a watchdog thread.
*/
public static Source source(Socket socket) throws IOException {
if (socket == null) throw new IllegalArgumentException("socket == null");
AsyncTimeout timeout = timeout(socket);
Source source = source(socket.getInputStream(), timeout);
return timeout.source(source);
}
private static AsyncTimeout timeout(final Socket socket) {
return new AsyncTimeout() {
@Override protected IOException newTimeoutException(@Nullable IOException cause) {
InterruptedIOException ioe = new SocketTimeoutException("timeout");
if (cause != null) {
ioe.initCause(cause);
}
return ioe;
}
@Override protected void timedOut() {
try {
socket.close();
} catch (Exception e) {
logger.log(Level.WARNING, "Failed to close timed out socket " + socket, e);
} catch (AssertionError e) {
if (isAndroidGetsocknameError(e)) {
// Catch this exception due to a Firmware issue up to android 4.2.2
// https://code.google.com/p/android/issues/detail?id=54072
logger.log(Level.WARNING, "Failed to close timed out socket " + socket, e);
} else {
throw e;
}
}
}
};
}
/**
* Returns true if {@code e} is due to a firmware bug fixed after Android 4.2.2.
* https://code.google.com/p/android/issues/detail?id=54072
*/
static boolean isAndroidGetsocknameError(AssertionError e) {
return e.getCause() != null && e.getMessage() != null
&& e.getMessage().contains("getsockname failed");
}
}
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