// Path: src/main/java/org/tools4j/hoverraft/command/CommandLog.java
// public interface CommandLog {
//     long size();
//     default long lastIndex() {
//         return size() - 1;
//     }
//     int readTerm(long index);
//     void readTo(long index, LogKey target);
//     void readTo(long index, CommandKey target);
//     void readTo(long index, LogEntry target);
// 
//     void append(int term, Command command);
//     void truncateIncluding(long index);
// 
//     default int lastTerm() {
//         return readTerm(lastIndex());
//     }
// 
//     default void lastKeyTo(final LogKey target) {
//         readTo(lastIndex(), target);
//     }
// 
//     default int lastKeyCompareTo(final LogKey logKey) {
//         final int termCompare = Integer.compare(lastTerm(), logKey.term());
//         return termCompare == 0 ? Long.compare(lastIndex(), logKey.index()) : termCompare;
//     }
// 
//     boolean contains(CommandKey commandKey);
//     default LogContainment contains(final LogKey logKey) {
//         return LogContainment.containmentFor(logKey, this);
//     }
// 
// }
// 
// Path: src/main/java/org/tools4j/hoverraft/config/ConsensusConfig.java
// public interface ConsensusConfig {
//     long minElectionTimeoutMillis();
//     long maxElectionTimeoutMillis();
//     long heartbeatTimeoutMillis();
//     Optional<String> ipcMulticastChannel();
//     int serverCount();
//     ServerConfig serverConfig(int index);
//     int sourceCount();
//     SourceConfig sourceConfig(int index);
//     ThreadingMode threadingMode();
// 
//     default ServerConfig serverConfigByIdOrNull(int id) {
//         for (int i = 0; i < serverCount(); i++) {
//             final ServerConfig config = serverConfig(i);
//             if (config.id() == id) {
//                 return config;
//             }
//         }
//         return null;
//     }
// 
//     default SourceConfig sourceConfigByIdOrNull(int id) {
//         for (int i = 0; i < sourceCount(); i++) {
//             final SourceConfig config = sourceConfig(i);
//             if (config.id() == id) {
//                 return config;
//             }
//         }
//         return null;
//     }
// }
// 
// Path: src/main/java/org/tools4j/hoverraft/config/ServerConfig.java
// public interface ServerConfig {
//     int id();
//     String channel();
// }
// 
// Path: src/main/java/org/tools4j/hoverraft/util/Files.java
// public class Files {
// 
//     private static final int INITIAL_BUFFER_SIZE = 1024;
// 
//     public static final String SYS_PROP_FILE_DIR = "org.tools4j.hoverraft.FileDir";
// 
//     public static final String defaultFileDirectory() {
//         return System.getProperty("java.util.tmpdir");
//     }
// 
//     public static final String fileDirectory() {
//         return System.getProperty(SYS_PROP_FILE_DIR, defaultFileDirectory());
//     }
// 
//     public static final String fileName(final int serverId, final String name) {
//         return "hover-raft_" + serverId + "_" + name;
//     }
// 
//     public static final CommandLog commandLog(final int serverId, final String name) throws IOException {
//         final String path = Files.fileDirectory();
//         final String child = Files.fileName(serverId, name);
//         final Chronicle chronicle = ChronicleQueueBuilder.vanilla(path, child).build();
//         return new ChronicleCommandLog((VanillaChronicle)chronicle, new ExpandableArrayBuffer(INITIAL_BUFFER_SIZE));
//     }
// }


import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import org.agrona.MutableDirectBuffer;
import org.agrona.concurrent.UnsafeBuffer;
import org.tools4j.hoverraft.command.CommandLog;
import org.tools4j.hoverraft.config.ConsensusConfig;
import org.tools4j.hoverraft.config.ServerConfig;
import org.tools4j.hoverraft.util.Files;
/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2017 hover-raft (tools4j), Marco Terzer
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.tools4j.hoverraft.state;



public final class DirectPersistentState implements PersistentState {

    private static final int STATE_SIZE = 4 + 4;

    private final MutableDirectBuffer state;
    private final CommandLog commandLog;

// Path: src/main/java/org/tools4j/hoverraft/command/CommandLog.java
// public interface CommandLog {
//     long size();
//     default long lastIndex() {
//         return size() - 1;
//     }
//     int readTerm(long index);
//     void readTo(long index, LogKey target);
//     void readTo(long index, CommandKey target);
//     void readTo(long index, LogEntry target);
// 
//     void append(int term, Command command);
//     void truncateIncluding(long index);
// 
//     default int lastTerm() {
//         return readTerm(lastIndex());
//     }
// 
//     default void lastKeyTo(final LogKey target) {
//         readTo(lastIndex(), target);
//     }
// 
//     default int lastKeyCompareTo(final LogKey logKey) {
//         final int termCompare = Integer.compare(lastTerm(), logKey.term());
//         return termCompare == 0 ? Long.compare(lastIndex(), logKey.index()) : termCompare;
//     }
// 
//     boolean contains(CommandKey commandKey);
//     default LogContainment contains(final LogKey logKey) {
//         return LogContainment.containmentFor(logKey, this);
//     }
// 
// }
// 
// Path: src/main/java/org/tools4j/hoverraft/config/ConsensusConfig.java
// public interface ConsensusConfig {
//     long minElectionTimeoutMillis();
//     long maxElectionTimeoutMillis();
//     long heartbeatTimeoutMillis();
//     Optional<String> ipcMulticastChannel();
//     int serverCount();
//     ServerConfig serverConfig(int index);
//     int sourceCount();
//     SourceConfig sourceConfig(int index);
//     ThreadingMode threadingMode();
// 
//     default ServerConfig serverConfigByIdOrNull(int id) {
//         for (int i = 0; i < serverCount(); i++) {
//             final ServerConfig config = serverConfig(i);
//             if (config.id() == id) {
//                 return config;
//             }
//         }
//         return null;
//     }
// 
//     default SourceConfig sourceConfigByIdOrNull(int id) {
//         for (int i = 0; i < sourceCount(); i++) {
//             final SourceConfig config = sourceConfig(i);
//             if (config.id() == id) {
//                 return config;
//             }
//         }
//         return null;
//     }
// }
// 
// Path: src/main/java/org/tools4j/hoverraft/config/ServerConfig.java
// public interface ServerConfig {
//     int id();
//     String channel();
// }
// 
// Path: src/main/java/org/tools4j/hoverraft/util/Files.java
// public class Files {
// 
//     private static final int INITIAL_BUFFER_SIZE = 1024;
// 
//     public static final String SYS_PROP_FILE_DIR = "org.tools4j.hoverraft.FileDir";
// 
//     public static final String defaultFileDirectory() {
//         return System.getProperty("java.util.tmpdir");
//     }
// 
//     public static final String fileDirectory() {
//         return System.getProperty(SYS_PROP_FILE_DIR, defaultFileDirectory());
//     }
// 
//     public static final String fileName(final int serverId, final String name) {
//         return "hover-raft_" + serverId + "_" + name;
//     }
// 
//     public static final CommandLog commandLog(final int serverId, final String name) throws IOException {
//         final String path = Files.fileDirectory();
//         final String child = Files.fileName(serverId, name);
//         final Chronicle chronicle = ChronicleQueueBuilder.vanilla(path, child).build();
//         return new ChronicleCommandLog((VanillaChronicle)chronicle, new ExpandableArrayBuffer(INITIAL_BUFFER_SIZE));
//     }
// }


// Path: src/main/java/org/tools4j/hoverraft/state/DirectPersistentState.java
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import org.agrona.MutableDirectBuffer;
import org.agrona.concurrent.UnsafeBuffer;
import org.tools4j.hoverraft.command.CommandLog;
import org.tools4j.hoverraft.config.ConsensusConfig;
import org.tools4j.hoverraft.config.ServerConfig;
import org.tools4j.hoverraft.util.Files;

/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2017 hover-raft (tools4j), Marco Terzer
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.tools4j.hoverraft.state;



public final class DirectPersistentState implements PersistentState {

    private static final int STATE_SIZE = 4 + 4;

    private final MutableDirectBuffer state;
    private final CommandLog commandLog;

    public DirectPersistentState(final ServerConfig serverConfig, final ConsensusConfig consensusConfig) throws IOException {