joshelser commented on a change in pull request #25: RATIS-588 LogStream StateMachine export URL: https://github.com/apache/incubator-ratis/pull/25#discussion_r294418656
########## File path: ratis-logservice/src/main/java/org/apache/ratis/logservice/impl/ArchiveLogStreamImpl.java ########## @@ -0,0 +1,153 @@ +/** + * 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.ratis.logservice.impl; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.List; + +import org.apache.ratis.client.RaftClient; +import org.apache.ratis.logservice.api.ArchiveLogReader; +import org.apache.ratis.logservice.api.LogName; +import org.apache.ratis.logservice.api.LogServiceConfiguration; +import org.apache.ratis.logservice.api.LogStream; +import org.apache.ratis.logservice.api.LogWriter; +import org.apache.ratis.logservice.api.RecordListener; +import org.apache.ratis.logservice.common.Constants; +import org.apache.ratis.logservice.util.LogServiceUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class ArchiveLogStreamImpl implements LogStream { + public static final Logger LOG = LoggerFactory.getLogger(ArchiveLogStreamImpl.class); + /* + * Directory of the archived files + */ + private String location; + + /* + * Log stream listeners + */ + List<RecordListener> listeners; + /* + * Log stream name + */ + LogName name; + /* + * Log stream configuration + */ + LogServiceConfiguration config; + /* + * State + */ + State state; + + + public ArchiveLogStreamImpl(LogName name, LogServiceConfiguration config) { + this(name, config.get(Constants.LOG_SERVICE_ARCHIVAL_LOCATION_KEY)); + if(config!=null) { + this.config = config; + } + init(); + } + + protected ArchiveLogStreamImpl(LogName name, String location) { + this.name = name; + this.location = location; + } + + protected void init() { + state = State.ARCHIVED; + listeners = Collections.synchronizedList(new ArrayList<RecordListener>()); + } + + @Override + public LogName getName() { + return name; + } + + @Override public State getState() throws IOException { + return state; + } + + @Override + public long getSize() throws IOException{ + throw new UnsupportedOperationException("getSize()"); + } + + @Override + public long getLength() throws IOException { + throw new UnsupportedOperationException("getLength()"); + } + + @Override + public ArchiveLogReader createReader() throws IOException { + return new ArchiveHdfsLogReader(LogServiceUtils.getArchiveLocationForLog(location, name)); + } + + @Override + public LogWriter createWriter() { + throw new UnsupportedOperationException("Arhived log cannot be written"); Review comment: Nit spelling. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
