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/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.hadoop.ozone.container.common.statemachine.commandhandler;
import org.apache.hadoop.hdds.protocol.proto.StorageContainerDatanodeProtocolProtos.SCMCmdType;
import org.apache.hadoop.ozone.container.common.statemachine.SCMConnectionManager;
import org.apache.hadoop.ozone.container.common.statemachine.StateContext;
import org.apache.hadoop.ozone.container.ozoneimpl.OzoneContainer;
import org.apache.hadoop.ozone.protocol.commands.SCMCommand;
/**
* Generic interface for handlers.
*/
public interface CommandHandler {
/**
* Handles a given SCM command.
* @param command - SCM Command
* @param container - Ozone Container.
* @param context - Current Context.
* @param connectionManager - The SCMs that we are talking to.
*/
void handle(SCMCommand command, OzoneContainer container,
StateContext context, SCMConnectionManager connectionManager);
/**
* Returns the command type that this command handler handles.
* @return Type
*/
SCMCmdType getCommandType();
/**
* Returns number of times this handler has been invoked.
* @return int
*/
int getInvocationCount();
/**
* Returns the average time this function takes to run.
* @return long
*/
long getAverageRunTime();
}
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