| /* |
| * 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.core.layout; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.logging.log4j.core.appender.OutputStreamManager; |
| |
| /** |
| * ByteBufferDestination is the destination that {@link Encoder}s write binary data to. It encapsulates a |
| * {@code ByteBuffer} and a {@code drain()} method the producer can call when the {@code ByteBuffer} is full. |
| * <p> |
| * This interface allows a producer to write arbitrary amounts of data to a destination. |
| * </p> |
| * @since 2.6 |
| */ |
| public interface ByteBufferDestination { |
| /** |
| * Returns the buffer to write to. |
| * |
| * @return the buffer to write to |
| */ |
| ByteBuffer getByteBuffer(); |
| |
| /** |
| * Consumes the buffer content and returns a buffer with more {@linkplain ByteBuffer#remaining() available} space |
| * (which may or may not be the same instance). |
| * <p> |
| * Called by the producer when buffer becomes too full to write to. |
| * |
| * @param buf the buffer to drain |
| * @return a buffer with more available space (which may or may not be the same instance) |
| */ |
| ByteBuffer drain(ByteBuffer buf); |
| |
| /** |
| * Writes the given data to this ByteBufferDestination entirely. Call of this method should *not* be protected |
| * with synchronized on this ByteBufferDestination instance. ByteBufferDestination implementations should |
| * synchronize themselves inside this method, if needed. |
| * |
| * @since 2.9 (see LOG4J2-1874) |
| */ |
| void writeBytes(ByteBuffer data); |
| |
| /** |
| * Writes the given data to this ByteBufferDestination. Call of this method should *not* be protected with |
| * synchronized on this ByteBufferDestination instance. ByteBufferDestination implementations should |
| * synchronize themselves inside this method, if needed. |
| * <p> |
| * This method should behave identically to {@code writeBytes(ByteBuffer.wrap(data, offset, length)}. |
| * It is provided to allow callers not to generate extra garbage. |
| * <p> |
| * This method is called writeBytes() to avoid clashing with {@link OutputStreamManager#write(byte[], int, int)}, |
| * which might be overridden in user-defined subclasses as protected, hence adding it to interface and requiring |
| * the method to be public breaks source compatibility. |
| * |
| * @since 2.9 (see LOG4J2-1874) |
| */ |
| void writeBytes(byte[] data, int offset, int length); |
| } |