Related: #4333 #4421 #5128 Motivation: slice(), duplicate() and readSlice() currently create a non-recyclable derived buffer instance. Under heavy load, an application that creates a lot of derived buffers can put the garbage collector under pressure. Modifications: - Add the following methods which creates a non-recyclable derived buffer - retainedSlice() - retainedDuplicate() - readRetainedSlice() - Add the new recyclable derived buffer implementations, which has its own reference count value - Add ByteBufHolder.retainedDuplicate() - Add ByteBufHolder.replace(ByteBuf) so that.. - a user can replace the content of the holder in a consistent way - copy/duplicate/retainedDuplicate() can delegate the holder construction to replace(ByteBuf) - Use retainedDuplicate() and retainedSlice() wherever possible - Miscellaneous: - Rename DuplicateByteBufTest to DuplicatedByteBufTest (missing 'D') - Make ReplayingDecoderByteBuf.reject() return an exception instead of throwing it so that its callers don't need to add dummy return statement Result: Derived buffers are now recycled when created via retainedSlice() and retainedDuplicate() and derived from a pooled buffer
233 lines
6.1 KiB
Java
233 lines
6.1 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http.multipart;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelException;
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import io.netty.handler.codec.http.HttpConstants;
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import java.io.IOException;
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import java.nio.charset.Charset;
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import static io.netty.buffer.Unpooled.wrappedBuffer;
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/**
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* Disk implementation of Attributes
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*/
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public class DiskAttribute extends AbstractDiskHttpData implements Attribute {
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public static String baseDirectory;
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public static boolean deleteOnExitTemporaryFile = true;
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public static final String prefix = "Attr_";
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public static final String postfix = ".att";
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/**
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* Constructor used for huge Attribute
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*/
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public DiskAttribute(String name) {
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this(name, HttpConstants.DEFAULT_CHARSET);
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}
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public DiskAttribute(String name, long definedSize) {
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this(name, definedSize, HttpConstants.DEFAULT_CHARSET);
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}
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public DiskAttribute(String name, Charset charset) {
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super(name, charset, 0);
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}
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public DiskAttribute(String name, long definedSize, Charset charset) {
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super(name, charset, definedSize);
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}
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public DiskAttribute(String name, String value) throws IOException {
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this(name, value, HttpConstants.DEFAULT_CHARSET);
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}
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public DiskAttribute(String name, String value, Charset charset) throws IOException {
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super(name, charset, 0); // Attribute have no default size
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setValue(value);
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}
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@Override
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public HttpDataType getHttpDataType() {
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return HttpDataType.Attribute;
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}
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@Override
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public String getValue() throws IOException {
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byte [] bytes = get();
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return new String(bytes, getCharset());
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}
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@Override
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public void setValue(String value) throws IOException {
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if (value == null) {
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throw new NullPointerException("value");
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}
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byte [] bytes = value.getBytes(getCharset());
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checkSize(bytes.length);
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ByteBuf buffer = wrappedBuffer(bytes);
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if (definedSize > 0) {
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definedSize = buffer.readableBytes();
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}
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setContent(buffer);
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}
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@Override
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public void addContent(ByteBuf buffer, boolean last) throws IOException {
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final long newDefinedSize = size + buffer.readableBytes();
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checkSize(newDefinedSize);
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if (definedSize > 0 && definedSize < newDefinedSize) {
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definedSize = newDefinedSize;
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}
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super.addContent(buffer, last);
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}
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@Override
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public int hashCode() {
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return getName().hashCode();
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}
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof Attribute)) {
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return false;
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}
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Attribute attribute = (Attribute) o;
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return getName().equalsIgnoreCase(attribute.getName());
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}
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@Override
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public int compareTo(InterfaceHttpData o) {
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if (!(o instanceof Attribute)) {
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throw new ClassCastException("Cannot compare " + getHttpDataType() +
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" with " + o.getHttpDataType());
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}
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return compareTo((Attribute) o);
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}
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public int compareTo(Attribute o) {
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return getName().compareToIgnoreCase(o.getName());
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}
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@Override
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public String toString() {
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try {
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return getName() + '=' + getValue();
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} catch (IOException e) {
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return getName() + '=' + e;
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}
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}
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@Override
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protected boolean deleteOnExit() {
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return deleteOnExitTemporaryFile;
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}
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@Override
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protected String getBaseDirectory() {
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return baseDirectory;
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}
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@Override
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protected String getDiskFilename() {
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return getName() + postfix;
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}
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@Override
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protected String getPostfix() {
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return postfix;
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}
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@Override
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protected String getPrefix() {
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return prefix;
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}
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@Override
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public Attribute copy() {
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final ByteBuf content = content();
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return replace(content != null ? content.copy() : null);
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}
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@Override
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public Attribute duplicate() {
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final ByteBuf content = content();
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return replace(content != null ? content.duplicate() : null);
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}
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@Override
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public Attribute retainedDuplicate() {
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ByteBuf content = content();
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if (content != null) {
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content = content.retainedDuplicate();
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boolean success = false;
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try {
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Attribute duplicate = replace(content);
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success = true;
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return duplicate;
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} finally {
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if (!success) {
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content.release();
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}
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}
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} else {
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return replace(null);
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}
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}
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@Override
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public Attribute replace(ByteBuf content) {
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DiskAttribute attr = new DiskAttribute(getName());
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attr.setCharset(getCharset());
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if (content != null) {
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try {
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attr.setContent(content);
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} catch (IOException e) {
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throw new ChannelException(e);
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}
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}
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return attr;
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}
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@Override
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public Attribute retain(int increment) {
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super.retain(increment);
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return this;
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}
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@Override
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public Attribute retain() {
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super.retain();
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return this;
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}
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@Override
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public Attribute touch() {
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super.touch();
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return this;
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}
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@Override
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public Attribute touch(Object hint) {
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super.touch(hint);
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return this;
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}
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}
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