/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.replication.common;
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/**
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* The possible events for the status state machine of a DS. See StateMachine
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* class for further details.
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*/
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public enum StatusMachineEvent
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{
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/**
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* Invalid event: special event used to be returned by some methods to signal
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* an error.
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*/
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INVALID_EVENT((byte) -1),
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/**
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* Event used when one wants the DS to enter the NOT_CONNECTED_STATUS.
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*/
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TO_NOT_CONNECTED_STATUS_EVENT((byte) 0),
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/**
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* Event used when one wants the DS to enter the NORMAL_STATUS.
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*/
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TO_NORMAL_STATUS_EVENT((byte) 1),
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/**
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* Event used when one wants the DS to enter the DEGRADED_STATUS.
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*/
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TO_DEGRADED_STATUS_EVENT((byte) 2),
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/**
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* Event used when one wants the DS to enter the FULL_UPDATE_STATUS.
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*/
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TO_FULL_UPDATE_STATUS_EVENT((byte) 3),
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/**
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* Event used when one wants the DS to enter the BAD_GEN_ID_STATUS.
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*/
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TO_BAD_GEN_ID_STATUS_EVENT((byte) 4);
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// The status value
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private byte value = -1;
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private StatusMachineEvent(byte value)
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{
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this.value = value;
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}
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/**
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* Returns the StatusMachineEvent matching the passed event numeric
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* representation.
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* @param value The numeric value for the event to return
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* @return The matching StatusMachineEvent
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* @throws java.lang.IllegalArgumentException If provided event value is
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* wrong
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*/
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public static StatusMachineEvent valueOf(byte value)
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throws IllegalArgumentException
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{
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switch (value)
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{
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case 0:
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return TO_NOT_CONNECTED_STATUS_EVENT;
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case 1:
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return TO_NORMAL_STATUS_EVENT;
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case 2:
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return TO_DEGRADED_STATUS_EVENT;
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case 3:
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return TO_FULL_UPDATE_STATUS_EVENT;
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case 4:
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return TO_BAD_GEN_ID_STATUS_EVENT;
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default:
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throw new IllegalArgumentException("Wrong event numeric value: "
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+ value);
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}
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}
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/**
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* Returns the event matching the passed requested status.
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* When an entity receives a request to enter a particular status, this
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* order is translated into a state machine event according to what is
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* requested. Then, according to the current status and the computed event,
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* the state machine retruns the matching new status
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* (StateMachine.computeNewStatus).
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* @param reqStatus The status to translate to an event.
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* @return The matching event.
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*/
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public static StatusMachineEvent statusToEvent(ServerStatus reqStatus)
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{
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switch (reqStatus)
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{
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case NOT_CONNECTED_STATUS:
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return TO_NOT_CONNECTED_STATUS_EVENT;
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case NORMAL_STATUS:
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return TO_NORMAL_STATUS_EVENT;
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case DEGRADED_STATUS:
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return TO_DEGRADED_STATUS_EVENT;
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case FULL_UPDATE_STATUS:
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return TO_FULL_UPDATE_STATUS_EVENT;
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case BAD_GEN_ID_STATUS:
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return TO_BAD_GEN_ID_STATUS_EVENT;
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default:
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return INVALID_EVENT;
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}
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}
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/**
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* Get a numeric representation of the event.
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* @return The numeric representation of the event
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*/
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public byte getValue()
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{
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return value;
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}
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}
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