org.apache.kafka.common.network.Selectable Maven / Gradle / Ivy
/*
* 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.kafka.common.network;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.List;
import java.util.Map;
/**
* An interface for asynchronous, multi-channel network I/O
*/
public interface Selectable {
/**
* See {@link #connect(String, InetSocketAddress, int, int) connect()}
*/
int USE_DEFAULT_BUFFER_SIZE = -1;
/**
* Begin establishing a socket connection to the given address identified by the given address
* @param id The id for this connection
* @param address The address to connect to
* @param sendBufferSize The send buffer for the socket
* @param receiveBufferSize The receive buffer for the socket
* @throws IOException If we cannot begin connecting
*/
void connect(String id, InetSocketAddress address, int sendBufferSize, int receiveBufferSize) throws IOException;
/**
* Wakeup this selector if it is blocked on I/O
*/
void wakeup();
/**
* Close this selector
*/
void close();
/**
* Close the connection identified by the given id
*/
void close(String id);
/**
* Queue the given request for sending in the subsequent {@link #poll(long) poll()} calls
* @param send The request to send
*/
void send(Send send);
/**
* Do I/O. Reads, writes, connection establishment, etc.
* @param timeout The amount of time to block if there is nothing to do
* @throws IOException
*/
void poll(long timeout) throws IOException;
/**
* The list of sends that completed on the last {@link #poll(long) poll()} call.
*/
List completedSends();
/**
* The list of receives that completed on the last {@link #poll(long) poll()} call.
*/
List completedReceives();
/**
* The connections that finished disconnecting on the last {@link #poll(long) poll()}
* call. Channel state indicates the local channel state at the time of disconnection.
*/
Map disconnected();
/**
* The list of connections that completed their connection on the last {@link #poll(long) poll()}
* call.
*/
List connected();
/**
* Disable reads from the given connection
* @param id The id for the connection
*/
void mute(String id);
/**
* Re-enable reads from the given connection
* @param id The id for the connection
*/
void unmute(String id);
/**
* Disable reads from all connections
*/
void muteAll();
/**
* Re-enable reads from all connections
*/
void unmuteAll();
/**
* returns true if a channel is ready
* @param id The id for the connection
*/
boolean isChannelReady(String id);
}