| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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 |
| * |
| * 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 org.apache.logging.log4j.perf.nogc; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.logging.log4j.core.Layout; |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.core.appender.AbstractAppender; |
| import org.apache.logging.log4j.core.config.Property; |
| import org.apache.logging.log4j.core.layout.ByteBufferDestination; |
| import org.apache.logging.log4j.core.layout.ByteBufferDestinationHelper; |
| |
| /** |
| * Demo Appender that does not do any I/O. |
| */ |
| public class DemoAppender extends AbstractAppender implements ByteBufferDestination { |
| private final ByteBuffer byteBuffer = ByteBuffer.wrap(new byte[4096]); |
| |
| public long checksum; |
| |
| public DemoAppender(final Layout<?> layout) { |
| super("demo", null, layout, true, Property.EMPTY_ARRAY); |
| } |
| |
| @Override |
| public void append(final LogEvent event) { |
| final Layout<?> layout = getLayout(); |
| if (layout instanceof NoGcLayout) { |
| layout.encode(event, this); |
| drain(byteBuffer); |
| } else { |
| final byte[] binary = getLayout().toByteArray(event); |
| consume(binary, 0, binary.length); |
| } |
| } |
| |
| private void consume(final byte[] data, final int offset, final int limit) { |
| // need to do something with the result or the JVM may optimize everything away |
| long sum = 0; |
| for (int i = offset; i < limit; i++) { |
| sum += data[i]; |
| } |
| checksum += sum; |
| } |
| |
| @Override |
| public ByteBuffer getByteBuffer() { |
| return byteBuffer; |
| } |
| |
| @Override |
| public ByteBuffer drain(final ByteBuffer buf) { |
| buf.flip(); |
| consume(buf.array(), buf.arrayOffset() + buf.position(), buf.arrayOffset() + buf.limit()); |
| buf.clear(); |
| return buf; |
| } |
| |
| @Override |
| public void writeBytes(final ByteBuffer data) { |
| ByteBufferDestinationHelper.writeToUnsynchronized(data, this); |
| } |
| |
| @Override |
| public void writeBytes(final byte[] data, final int offset, final int length) { |
| ByteBufferDestinationHelper.writeToUnsynchronized(data, offset, length, this); |
| } |
| } |