Java tutorial
/* * Copyright (c) 2015 Huawei, Inc and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.usc.protocol; import java.util.Arrays; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import org.opendaylight.usc.protocol.UscHeader.OperationType; /** * An USC Error packet. */ public class UscError extends UscFrame { /** * The possible error codes that can be encountered in an USC session. */ public static enum ErrorCode { EAGAIN(11), EPIPE(32), EADDRINUSE(98), ENETDOWN(100), ENETUNREACH(101), ENETRESET(102), ECONNABORTED( 103), ECONNRESET(104), EISCONN( 106), ENOTCONN(107), ESHUTDOWN(108), ETIMEDOUT(110), ECONNREFUSED(111), E_OTHER(0); private final int code; private ErrorCode(int code) { this.code = code; } public int getCode() { return this.code; } @Override public String toString() { return this.code + "=" + this.name(); } } private final static int PAYLOAD_LENGTH = 2; private final ErrorCode errorCode; /** * Constructs a new UscError * * @param port * @param sessionId * @param errorCode */ public UscError(int port, int sessionId, int errorCode) { super(OperationType.ERROR, port, sessionId, PAYLOAD_LENGTH); this.errorCode = Arrays.stream(ErrorCode.values()).filter(e -> e.code == errorCode).findAny() .orElse(ErrorCode.E_OTHER); } @Override public ByteBuf getPayload() { return Unpooled.copyShort(errorCode.code); } /** * Returns the error code * * @return the error code */ public ErrorCode getErrorCode() { return errorCode; } }