| /* |
| * 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.nifi.processor.util.put.sender; |
| |
| import org.apache.nifi.logging.ComponentLog; |
| import java.io.IOException; |
| import java.nio.charset.Charset; |
| |
| /** |
| * Base class for sending messages over a channel. |
| */ |
| public abstract class ChannelSender { |
| |
| protected final int port; |
| protected final String host; |
| protected final int maxSendBufferSize; |
| protected final ComponentLog logger; |
| |
| protected volatile int timeout = 10000; |
| protected volatile long lastUsed; |
| |
| public ChannelSender(final String host, final int port, final int maxSendBufferSize, final ComponentLog logger) { |
| this.port = port; |
| this.host = host; |
| this.maxSendBufferSize = maxSendBufferSize; |
| this.logger = logger; |
| } |
| |
| public void setTimeout(int timeout) { |
| this.timeout = timeout; |
| } |
| |
| public int getTimeout() { |
| return timeout; |
| } |
| |
| /** |
| * @return the last time data was sent over this channel |
| */ |
| public long getLastUsed() { |
| return lastUsed; |
| } |
| |
| /** |
| * Opens the connection to the destination. |
| * |
| * @throws IOException if an error occurred opening the connection. |
| */ |
| public abstract void open() throws IOException; |
| |
| /** |
| * Sends the given string over the channel. |
| * |
| * @param message the message to send over the channel |
| * @throws IOException if there was an error communicating over the channel |
| */ |
| public void send(final String message, final Charset charset) throws IOException { |
| final byte[] bytes = message.getBytes(charset); |
| send(bytes); |
| } |
| |
| /** |
| * Sends the given data over the channel. |
| * |
| * @param data the data to send over the channel |
| * @throws IOException if there was an error communicating over the channel |
| */ |
| public void send(final byte[] data) throws IOException { |
| try { |
| write(data); |
| lastUsed = System.currentTimeMillis(); |
| } catch (IOException e) { |
| // failed to send data over the channel, we close it to force |
| // the creation of a new one next time |
| close(); |
| throw e; |
| } |
| } |
| |
| /** |
| * Write the given buffer to the underlying channel. |
| */ |
| protected abstract void write(byte[] data) throws IOException; |
| |
| /** |
| * @return true if the underlying channel is connected |
| */ |
| public abstract boolean isConnected(); |
| |
| /** |
| * Close the underlying channel |
| */ |
| public abstract void close(); |
| |
| } |