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Java 8 migration. Auto close for try catch blocks (#8752)

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Motivation:

Since Java 7 we can automatically close resources in try () construction.

Modification:

Changed all try catches in the code with autoclose try (resource)

Result:

Less boiler-plate
This commit is contained in:
Dmitriy Dumanskiy 2019-01-22 16:57:30 +02:00 committed by Norman Maurer
parent b2a9a8e9fe
commit c34340fff8
12 changed files with 30 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractDiskHttpData.java
View File

@ -125,8 +125,7 @@ public abstract class AbstractDiskHttpData extends AbstractHttpData {
}
return;
}
FileOutputStream outputStream = new FileOutputStream(file);
try {
try (FileOutputStream outputStream = new FileOutputStream(file)) {
FileChannel localfileChannel = outputStream.getChannel();
ByteBuffer byteBuffer = buffer.nioBuffer();
int written = 0;
@ -135,8 +134,6 @@ public abstract class AbstractDiskHttpData extends AbstractHttpData {
}
buffer.readerIndex(buffer.readerIndex() + written);
localfileChannel.force(false);
} finally {
outputStream.close();
}
setCompleted();
} finally {
@ -217,9 +214,8 @@ public abstract class AbstractDiskHttpData extends AbstractHttpData {
delete();
}
file = tempFile();
FileOutputStream outputStream = new FileOutputStream(file);
int written = 0;
try {
try (FileOutputStream outputStream = new FileOutputStream(file)) {
FileChannel localfileChannel = outputStream.getChannel();
byte[] bytes = new byte[4096 * 4];
ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
@ -231,8 +227,6 @@ public abstract class AbstractDiskHttpData extends AbstractHttpData {
read = inputStream.read(bytes);
}
localfileChannel.force(false);
} finally {
outputStream.close();
}
size = written;
if (definedSize > 0 && definedSize < size) {
@ -422,17 +416,14 @@ public abstract class AbstractDiskHttpData extends AbstractHttpData {
throw new IllegalArgumentException(
"File too big to be loaded in memory");
}
FileInputStream inputStream = new FileInputStream(src);
byte[] array = new byte[(int) srcsize];
try {
try (FileInputStream inputStream = new FileInputStream(src)) {
FileChannel fileChannel = inputStream.getChannel();
ByteBuffer byteBuffer = ByteBuffer.wrap(array);
int read = 0;
while (read < srcsize) {
read += fileChannel.read(byteBuffer);
}
} finally {
inputStream.close();
}
return array;
}

14
codec/src/main/java/io/netty/handler/codec/compression/LzmaFrameEncoder.java
View File

@ -175,22 +175,12 @@ public class LzmaFrameEncoder extends MessageToByteEncoder<ByteBuf> {
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception {
final int length = in.readableBytes();
InputStream bbIn = null;
ByteBufOutputStream bbOut = null;
try {
bbIn = new ByteBufInputStream(in);
bbOut = new ByteBufOutputStream(out);
try (InputStream bbIn = new ByteBufInputStream(in);
ByteBufOutputStream bbOut = new ByteBufOutputStream(out)) {
bbOut.writeByte(properties);
bbOut.writeInt(littleEndianDictionarySize);
bbOut.writeLong(Long.reverseBytes(length));
encoder.code(bbIn, bbOut, -1, -1, null);
} finally {
if (bbIn != null) {
bbIn.close();
}
if (bbOut != null) {
bbOut.close();
}
}
}

9
codec/src/main/java/io/netty/handler/codec/marshalling/CompatibleMarshallingDecoder.java
View File

@ -62,12 +62,13 @@ public class CompatibleMarshallingDecoder extends ReplayingDecoder<Void> {
return;
}
Unmarshaller unmarshaller = provider.getUnmarshaller(ctx);
// Call close in a finally block as the ReplayingDecoder will throw an Error if not enough bytes are
// readable. This helps to be sure that we do not leak resource
try (Unmarshaller unmarshaller = provider.getUnmarshaller(ctx)) {
ByteInput input = new ChannelBufferByteInput(buffer);
if (maxObjectSize != Integer.MAX_VALUE) {
input = new LimitingByteInput(input, maxObjectSize);
}
try {
unmarshaller.start(input);
Object obj = unmarshaller.readObject();
unmarshaller.finish();
@ -75,10 +76,6 @@ public class CompatibleMarshallingDecoder extends ReplayingDecoder<Void> {
} catch (LimitingByteInput.TooBigObjectException ignored) {
discardingTooLongFrame = true;
throw new TooLongFrameException();
} finally {
// Call close in a finally block as the ReplayingDecoder will throw an Error if not enough bytes are
// readable. This helps to be sure that we do not leak resource
unmarshaller.close();
}
}

10
codec/src/main/java/io/netty/handler/codec/marshalling/MarshallingDecoder.java
View File

@ -65,18 +65,14 @@ public class MarshallingDecoder extends LengthFieldBasedFrameDecoder {
return null;
}
Unmarshaller unmarshaller = provider.getUnmarshaller(ctx);
// Call close in a finally block as the ReplayingDecoder will throw an Error if not enough bytes are
// readable. This helps to be sure that we do not leak resource
try (Unmarshaller unmarshaller = provider.getUnmarshaller(ctx)) {
ByteInput input = new ChannelBufferByteInput(frame);
try {
unmarshaller.start(input);
Object obj = unmarshaller.readObject();
unmarshaller.finish();
return obj;
} finally {
// Call close in a finally block as the ReplayingDecoder will throw an Error if not enough bytes are
// readable. This helps to be sure that we do not leak resource
unmarshaller.close();
}
}

5
codec/src/main/java/io/netty/handler/codec/serialization/CompatibleObjectEncoder.java
View File

@ -73,8 +73,7 @@ public class CompatibleObjectEncoder extends MessageToByteEncoder<Serializable>
@Override
protected void encode(ChannelHandlerContext ctx, Serializable msg, ByteBuf out) throws Exception {
ObjectOutputStream oos = newObjectOutputStream(new ByteBufOutputStream(out));
try {
try (ObjectOutputStream oos = newObjectOutputStream(new ByteBufOutputStream(out))) {
if (resetInterval != 0) {
// Resetting will prevent OOM on the receiving side.
writtenObjects++;
@ -85,8 +84,6 @@ public class CompatibleObjectEncoder extends MessageToByteEncoder<Serializable>
oos.writeObject(msg);
oos.flush();
} finally {
oos.close();
}
}
}

6
codec/src/main/java/io/netty/handler/codec/serialization/ObjectDecoder.java
View File

@ -71,11 +71,9 @@ public class ObjectDecoder extends LengthFieldBasedFrameDecoder {
return null;
}
ObjectInputStream ois = new CompactObjectInputStream(new ByteBufInputStream(frame, true), classResolver);
try {
try (ObjectInputStream ois =
new CompactObjectInputStream(new ByteBufInputStream(frame, true), classResolver)) {
return ois.readObject();
} finally {
ois.close();
}
}
}

5
codec/src/main/java/io/netty/handler/codec/serialization/ObjectEncoderOutputStream.java
View File

@ -82,12 +82,9 @@ public class ObjectEncoderOutputStream extends OutputStream implements
public void writeObject(Object obj) throws IOException {
ByteBuf buf = Unpooled.buffer(estimatedLength);
try {
ObjectOutputStream oout = new CompactObjectOutputStream(new ByteBufOutputStream(buf));
try {
try (ObjectOutputStream oout = new CompactObjectOutputStream(new ByteBufOutputStream(buf))) {
oout.writeObject(obj);
oout.flush();
} finally {
oout.close();
}
int objectSize = buf.readableBytes();

7
common/src/main/java/io/netty/util/NetUtil.java
View File

@ -317,8 +317,7 @@ public final class NetUtil {
try {
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
try {
try (BufferedReader br = new BufferedReader(isr)) {
String line = br.readLine();
if (line.startsWith(sysctlKey)) {
for (int i = line.length() - 1; i > sysctlKey.length(); --i) {
@ -328,15 +327,11 @@ public final class NetUtil {
}
}
return null;
} finally {
br.close();
}
} finally {
if (process != null) {
process.destroy();
}
}
}
/**
* Returns {@code true} if IPv4 should be used even if the system supports both IPv4 and IPv6. Setting this

10
common/src/main/java/io/netty/util/Version.java
View File

@ -72,17 +72,11 @@ public final class Version {
Enumeration<URL> resources = classLoader.getResources("META-INF/io.netty.versions.properties");
while (resources.hasMoreElements()) {
URL url = resources.nextElement();
InputStream in = url.openStream();
try {
try (InputStream in = url.openStream()) {
props.load(in);
} finally {
try {
in.close();
} catch (Exception ignore) {
}
// Ignore.
}
}
}
} catch (Exception ignore) {
// Not critical. Just ignore.
}

5
example/src/main/java/io/netty/example/ocsp/OcspServerExample.java
View File

@ -170,11 +170,8 @@ public class OcspServerExample {
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(in, CharsetUtil.US_ASCII));
try {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, CharsetUtil.US_ASCII))) {
return parseCertificates(reader);
} finally {
reader.close();
}
} finally {
in.close();

10
example/src/main/java/io/netty/example/ocsp/OcspUtils.java
View File

@ -130,13 +130,11 @@ public final class OcspUtils {
connection.setRequestProperty("accept", OCSP_RESPONSE_TYPE);
connection.setRequestProperty("content-length", String.valueOf(encoded.length));
OutputStream out = connection.getOutputStream();
try {
try (OutputStream out = connection.getOutputStream()) {
out.write(encoded);
out.flush();
InputStream in = connection.getInputStream();
try {
try (InputStream in = connection.getInputStream()) {
int code = connection.getResponseCode();
if (code != HttpsURLConnection.HTTP_OK) {
throw new IOException("Unexpected status-code=" + code);
@ -169,11 +167,7 @@ public final class OcspUtils {
baos.close();
}
return new OCSPResp(baos.toByteArray());
} finally {
in.close();
}
} finally {
out.close();
}
} finally {
connection.disconnect();

24
testsuite/src/main/java/io/netty/testsuite/util/TestUtils.java
View File

@ -156,11 +156,8 @@ public final class TestUtils {
long lastLogTime = System.nanoTime();
long counter = 0;
InputStream in = null;
OutputStream out = null;
try {
in = new FileInputStream(filename);
out = new XZOutputStream(new FileOutputStream(xzFilename), options);
try (InputStream in = new FileInputStream(filename);
OutputStream out = new XZOutputStream(new FileOutputStream(xzFilename), options)) {
for (;;) {
int readBytes = in.read(buf);
if (readBytes < 0) {
@ -180,25 +177,8 @@ public final class TestUtils {
lastLogTime = currentTime;
}
}
out.close();
in.close();
} catch (Throwable t) {
logger.warn("Failed to compress the heap dump: {}", xzFilename, t);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException ignored) {
// Ignore.
}
}
if (out != null) {
try {
out.close();
} catch (IOException ignored) {
// Ignore.
}
}
}
// Delete the uncompressed dump in favor of the compressed one.