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package org.activeio.journal.active;
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import java.io.DataInput;
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import java.io.DataInputStream;
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import java.io.DataOutput;
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import java.io.DataOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.text.NumberFormat;
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import org.activeio.Packet;
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import org.activeio.adapter.PacketInputStream;
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import org.activeio.adapter.PacketOutputStream;
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import org.activeio.journal.InvalidRecordLocationException;
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import org.activeio.packet.ByteArrayPacket;
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import org.activeio.packet.ByteBufferPacket;
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36
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import EDU.oswego.cs.dl.util.concurrent.SynchronizedInt;
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38
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39
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final public class LogFileManager {
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public static final int DEFAULT_LOGFILE_COUNT = Integer.parseInt(System.getProperty("org.activeio.journal.active.DefaultLogFileCount", ""+(2)));
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public static final int DEFAULT_LOGFILE_SIZE = Integer.parseInt(System.getProperty("org.activeio.journal.active.DefaultLogFileSize", ""+(1024*1024*20)));
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50
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static final public int SERIALIZED_SIZE = 6+Location.SERIALIZED_SIZE;
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52
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static final public byte DATA_RECORD_TYPE = 1;
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static final public byte MARK_RECORD_TYPE = 2;
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static final private NumberFormat onlineLogNameFormat = NumberFormat.getNumberInstance();
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55
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static {
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4
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onlineLogNameFormat.setMinimumIntegerDigits(3);
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4
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onlineLogNameFormat.setMaximumIntegerDigits(3);
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4
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onlineLogNameFormat.setGroupingUsed(false);
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4
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onlineLogNameFormat.setParseIntegerOnly(true);
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4
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onlineLogNameFormat.setMaximumFractionDigits(0);
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}
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63
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64
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private final File logDirectory;
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private final int initialLogFileSize;
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private final int onlineLogFileCount;
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private final SynchronizedInt activeLogFileCount = new SynchronizedInt(0);
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69
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70
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private LogFileNode firstNode;
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private LogFileNode firstActiveNode;
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private LogFileNode firstInactiveNode;
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private LogFileNode appendNode;
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75
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private ControlFile controlFile;
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private int lastLogFileId = -1;
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private Location lastMark;
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private boolean disposed;
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79
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private boolean loadedFromCleanShutDown;
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80
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81
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82
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0
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public LogFileManager(File logDirectory) throws IOException {
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83
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0
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this(logDirectory, DEFAULT_LOGFILE_COUNT, DEFAULT_LOGFILE_SIZE);
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84
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}
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85
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|
86
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10
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public LogFileManager(File logDirectory, int onlineLogFileCount, int initialLogFileSize) throws IOException {
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87
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10
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this.logDirectory = logDirectory;
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88
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10
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this.onlineLogFileCount = onlineLogFileCount;
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89
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10
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this.initialLogFileSize = initialLogFileSize;
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90
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10
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initialize(onlineLogFileCount);
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91
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}
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92
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|
|
93
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10
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void initialize(int onlineLogFileCount) throws IOException {
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94
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95
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10
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LogFileNode logFiles[] = new LogFileNode[onlineLogFileCount];
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96
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|
97
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|
98
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10
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if (!logDirectory.exists()) {
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99
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10
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if (!logDirectory.mkdirs()) {
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100
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0
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throw new IOException("Could not create directory: " + logDirectory);
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101
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}
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102
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}
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103
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104
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105
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10
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int controlDataSize = SERIALIZED_SIZE + (LogFileNode.SERIALIZED_SIZE*onlineLogFileCount);
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106
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10
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controlFile = new ControlFile(new File(logDirectory, "control.dat"), controlDataSize);
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107
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108
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10
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controlFile.lock();
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109
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110
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111
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10
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for (int i = 0; i < onlineLogFileCount; i++) {
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112
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40
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LogFile file = new LogFile(new File(logDirectory, "log-" + onlineLogNameFormat.format(i) + ".dat"),
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113
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initialLogFileSize);
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114
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40
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logFiles[i] = new LogFileNode(file);
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115
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}
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116
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117
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118
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10
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for (int i = 0; i < onlineLogFileCount; i++) {
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119
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40
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if (i == (onlineLogFileCount - 1)) {
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120
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10
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logFiles[i].setNext(logFiles[0]);
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121
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} else {
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122
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30
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logFiles[i].setNext(logFiles[i + 1]);
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123
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}
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124
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}
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125
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126
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10
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firstNode = logFiles[0];
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127
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10
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loadState();
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128
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129
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130
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10
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for (int i = 0; i < onlineLogFileCount; i++) {
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131
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40
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if( logFiles[i].isActive() ) {
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132
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0
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if( firstActiveNode == null || logFiles[i].getId() < firstActiveNode.getId() ) {
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133
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0
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firstActiveNode = logFiles[i];
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134
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}
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135
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}
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136
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}
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137
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138
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139
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10
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if ( firstActiveNode == null ) {
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140
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10
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firstInactiveNode = logFiles[0];
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141
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10
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activateNextLogFile();
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142
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} else {
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143
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144
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0
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firstInactiveNode = null;
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145
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0
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LogFileNode log = firstActiveNode;
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146
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0
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do {
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147
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0
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if( !log.isActive() ) {
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148
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0
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firstInactiveNode = log;
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149
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0
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break;
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150
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} else {
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151
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0
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appendNode = log;
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152
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}
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153
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0
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log = log.getNext();
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154
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0
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} while (log != firstActiveNode);
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155
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}
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156
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157
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158
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159
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10
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if( !this.loadedFromCleanShutDown ) {
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160
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10
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checkAppendLog();
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161
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}
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162
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163
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10
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loadedFromCleanShutDown = false;
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164
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10
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storeState();
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165
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}
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166
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167
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10
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private void checkAppendLog() throws IOException {
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168
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169
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170
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171
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172
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10
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int offset = 0;
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173
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10
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Record record = new Record();
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174
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10
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LogFile logFile = appendNode.getLogFile();
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175
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10
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Location markLocation=null;
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176
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177
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10
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while( logFile.loadAndCheckRecord(offset, record) ) {
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178
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179
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0
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if( record.getLocation().getLogFileId()!= appendNode.getId() || record.getLocation().getLogFileOffset()!=offset ) {
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180
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181
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0
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break;
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182
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}
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183
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184
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0
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if ( record.getRecordType()==LogFileManager.MARK_RECORD_TYPE) {
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185
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0
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markLocation = record.getLocation();
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186
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}
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187
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188
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0
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offset += record.getRecordLength();
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189
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}
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190
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191
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10
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appendNode.setAppendOffset(offset);
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192
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|
193
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10
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if( markLocation!=null ) {
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194
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0
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try {
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195
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0
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Packet packet = readPacket(markLocation);
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196
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0
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markLocation = Location.readFromPacket(packet);
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197
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} catch (InvalidRecordLocationException e) {
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198
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0
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throw (IOException)new IOException(e.getMessage()).initCause(e);
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199
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}
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200
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0
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updateMark(markLocation);
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201
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|
}
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202
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|
|
203
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}
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204
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|
205
|
36
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private void storeState() throws IOException {
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206
|
36
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Packet controlData = controlFile.getControlData();
|
207
|
36
|
if( controlData.remaining() == 0 )
|
208
|
0
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return;
|
209
|
|
|
210
|
36
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DataOutput data = new DataOutputStream(new PacketOutputStream(controlData));
|
211
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|
|
212
|
36
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data.writeInt(lastLogFileId);
|
213
|
36
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data.writeBoolean(lastMark!=null);
|
214
|
36
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if( lastMark!=null )
|
215
|
0
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lastMark.writeToDataOutput(data);
|
216
|
36
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data.writeBoolean(loadedFromCleanShutDown);
|
217
|
|
|
218
|
|
|
219
|
36
|
LogFileNode log = firstNode;
|
220
|
36
|
do {
|
221
|
144
|
log.writeExternal( data );
|
222
|
144
|
log = log.getNext();
|
223
|
144
|
} while (log != firstNode);
|
224
|
|
|
225
|
36
|
controlFile.store();
|
226
|
|
}
|
227
|
|
|
228
|
10
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private void loadState() throws IOException {
|
229
|
10
|
if( controlFile.load() ) {
|
230
|
0
|
Packet controlData = controlFile.getControlData();
|
231
|
0
|
if( controlData.remaining() == 0 )
|
232
|
0
|
return;
|
233
|
|
|
234
|
0
|
DataInput data = new DataInputStream(new PacketInputStream(controlData));
|
235
|
|
|
236
|
0
|
lastLogFileId =data.readInt();
|
237
|
0
|
if( data.readBoolean() )
|
238
|
0
|
lastMark = Location.readFromDataInput(data);
|
239
|
|
else
|
240
|
0
|
lastMark = null;
|
241
|
0
|
loadedFromCleanShutDown = data.readBoolean();
|
242
|
|
|
243
|
|
|
244
|
0
|
LogFileNode log = firstNode;
|
245
|
0
|
do {
|
246
|
0
|
log.readExternal( data );
|
247
|
0
|
log = log.getNext();
|
248
|
0
|
} while (log != firstNode);
|
249
|
|
}
|
250
|
|
}
|
251
|
|
|
252
|
10
|
public void dispose() {
|
253
|
|
|
254
|
10
|
if (disposed)
|
255
|
0
|
return;
|
256
|
10
|
this.disposed = true;
|
257
|
|
|
258
|
10
|
try {
|
259
|
|
|
260
|
10
|
LogFileNode log = firstNode;
|
261
|
10
|
do {
|
262
|
40
|
log.getLogFile().dispose();
|
263
|
40
|
log = log.getNext();
|
264
|
40
|
} while (log != firstNode);
|
265
|
|
|
266
|
10
|
loadedFromCleanShutDown=true;
|
267
|
10
|
storeState();
|
268
|
10
|
controlFile.dispose();
|
269
|
|
} catch ( IOException e ) {
|
270
|
|
}
|
271
|
|
|
272
|
|
}
|
273
|
|
|
274
|
16
|
private int getNextLogFileId() {
|
275
|
16
|
return ++lastLogFileId;
|
276
|
|
}
|
277
|
|
|
278
|
|
|
279
|
|
|
280
|
|
|
281
|
|
|
282
|
20
|
public void append(BatchedWrite write) throws IOException {
|
283
|
|
|
284
|
20
|
if (!appendNode.isActive())
|
285
|
0
|
throw new IllegalStateException("Log file is not active. Writes are not allowed");
|
286
|
20
|
if (appendNode.isReadOnly())
|
287
|
0
|
throw new IllegalStateException("Log file has been marked Read Only. Writes are not allowed");
|
288
|
|
|
289
|
|
|
290
|
20
|
LogFile logFile = appendNode.getLogFile();
|
291
|
20
|
ByteBuffer buffer = ((ByteBufferPacket)write.getPacket().narrow(ByteBufferPacket.class)).getByteBuffer();
|
292
|
20
|
int size = buffer.remaining();
|
293
|
20
|
logFile.write(appendNode.getAppendOffset(), buffer);
|
294
|
20
|
if( write.getForce() )
|
295
|
16
|
logFile.force();
|
296
|
|
|
297
|
|
|
298
|
20
|
appendNode.appended(size);
|
299
|
20
|
if (write.getMark() != null) {
|
300
|
0
|
updateMark(write.getMark());
|
301
|
|
}
|
302
|
|
}
|
303
|
|
|
304
|
|
|
305
|
|
|
306
|
|
|
307
|
|
|
308
|
0
|
synchronized private void updateMark(Location mark) throws IOException {
|
309
|
|
|
310
|
0
|
this.lastMark = mark;
|
311
|
0
|
while (firstActiveNode != appendNode) {
|
312
|
0
|
if (firstActiveNode.getId() < lastMark.getLogFileId()) {
|
313
|
0
|
firstActiveNode.setActive(false);
|
314
|
0
|
activeLogFileCount.decrement();
|
315
|
0
|
if( firstInactiveNode ==null )
|
316
|
0
|
firstInactiveNode = firstActiveNode;
|
317
|
0
|
firstActiveNode = firstActiveNode.getNextActive();
|
318
|
|
} else {
|
319
|
0
|
break;
|
320
|
|
}
|
321
|
|
}
|
322
|
|
}
|
323
|
|
|
324
|
30
|
RecordInfo readRecordInfo(Location location) throws IOException, InvalidRecordLocationException {
|
325
|
|
|
326
|
30
|
LogFileNode logFileState = getLogFileWithId(location.getLogFileId());
|
327
|
|
|
328
|
30
|
if (logFileState.getAppendOffset() == location.getLogFileOffset()) {
|
329
|
0
|
throw new InvalidRecordLocationException("No record at (" + location
|
330
|
|
+ ") found. Location past end of logged data.");
|
331
|
|
}
|
332
|
|
|
333
|
|
|
334
|
30
|
try {
|
335
|
30
|
LogFile logFile = logFileState.getLogFile();
|
336
|
30
|
Record header = new Record();
|
337
|
30
|
logFile.readRecordHeader(location.getLogFileOffset(), header);
|
338
|
30
|
return new RecordInfo(location, header, logFileState);
|
339
|
|
} catch (IOException e) {
|
340
|
0
|
throw new InvalidRecordLocationException("No record at (" + location + ") found.");
|
341
|
|
}
|
342
|
|
}
|
343
|
|
|
344
|
30
|
LogFileNode getLogFileWithId(int logFileId) throws InvalidRecordLocationException {
|
345
|
30
|
for (LogFileNode lf = firstActiveNode; lf != null; lf = lf.getNextActive()) {
|
346
|
30
|
if (lf.getId() == logFileId) {
|
347
|
30
|
return lf;
|
348
|
|
}
|
349
|
|
|
350
|
|
|
351
|
0
|
if (logFileId < lf.getId())
|
352
|
0
|
break;
|
353
|
|
}
|
354
|
0
|
throw new InvalidRecordLocationException("Log file with id;" + logFileId + " is not active.");
|
355
|
|
}
|
356
|
|
|
357
|
|
|
358
|
|
|
359
|
|
|
360
|
|
|
361
|
10
|
public Location getNextDataRecordLocation(Location lastLocation) throws IOException, InvalidRecordLocationException {
|
362
|
10
|
RecordInfo ri = readRecordInfo(lastLocation);
|
363
|
10
|
while (true) {
|
364
|
|
|
365
|
10
|
int logFileId = ri.getLocation().getLogFileId();
|
366
|
10
|
int offset = ri.getNextLocation();
|
367
|
|
|
368
|
|
|
369
|
10
|
if (offset >= ri.getLogFileState().getAppendOffset()) {
|
370
|
2
|
LogFileNode nextActive = ri.getLogFileState().getNextActive();
|
371
|
2
|
if (nextActive == null) {
|
372
|
2
|
return null;
|
373
|
|
}
|
374
|
0
|
logFileId = nextActive.getId();
|
375
|
0
|
offset = 0;
|
376
|
|
}
|
377
|
|
|
378
|
8
|
try {
|
379
|
8
|
ri = readRecordInfo(new Location(logFileId, offset));
|
380
|
|
} catch (InvalidRecordLocationException e) {
|
381
|
0
|
return null;
|
382
|
|
}
|
383
|
|
|
384
|
|
|
385
|
8
|
if (ri.getHeader().getRecordType() == DATA_RECORD_TYPE) {
|
386
|
8
|
return ri.getLocation();
|
387
|
|
}
|
388
|
|
|
389
|
|
}
|
390
|
|
}
|
391
|
|
|
392
|
|
|
393
|
|
|
394
|
|
|
395
|
|
|
396
|
|
|
397
|
|
|
398
|
|
|
399
|
12
|
public Packet readPacket(Location location) throws IOException, InvalidRecordLocationException {
|
400
|
|
|
401
|
|
|
402
|
12
|
RecordInfo recordInfo = readRecordInfo(location);
|
403
|
|
|
404
|
12
|
byte data[] = new byte[recordInfo.getHeader().getPayloadLength()];
|
405
|
|
|
406
|
12
|
LogFile logFile = recordInfo.getLogFileState().getLogFile();
|
407
|
12
|
logFile.read(recordInfo.getDataOffset(), data);
|
408
|
|
|
409
|
12
|
return new ByteArrayPacket(data);
|
410
|
|
|
411
|
|
}
|
412
|
|
|
413
|
6
|
public int getInitialLogFileSize() {
|
414
|
6
|
return initialLogFileSize;
|
415
|
|
}
|
416
|
|
|
417
|
4
|
public Location getFirstActiveLogLocation() {
|
418
|
4
|
if (firstActiveNode == null)
|
419
|
0
|
return null;
|
420
|
4
|
if (firstActiveNode.getAppendOffset() == 0)
|
421
|
2
|
return null;
|
422
|
2
|
return new Location(firstActiveNode.getId(), 0);
|
423
|
|
}
|
424
|
|
|
425
|
16
|
void activateNextLogFile() throws IOException {
|
426
|
|
|
427
|
|
|
428
|
16
|
if (appendNode != null) {
|
429
|
6
|
appendNode.setReadOnly(true);
|
430
|
|
}
|
431
|
|
|
432
|
16
|
LogFileNode next = firstInactiveNode;
|
433
|
16
|
synchronized (this) {
|
434
|
16
|
firstInactiveNode = firstInactiveNode.getNextInactive();
|
435
|
16
|
next.activate(getNextLogFileId());
|
436
|
16
|
if (firstActiveNode == null) {
|
437
|
10
|
firstActiveNode = next;
|
438
|
|
}
|
439
|
|
}
|
440
|
16
|
activeLogFileCount.increment();
|
441
|
16
|
appendNode = next;
|
442
|
|
|
443
|
16
|
storeState();
|
444
|
|
}
|
445
|
|
|
446
|
|
|
447
|
|
|
448
|
|
|
449
|
2
|
public File getLogDirectory() {
|
450
|
2
|
return logDirectory;
|
451
|
|
}
|
452
|
|
|
453
|
|
|
454
|
|
|
455
|
|
|
456
|
6
|
public Location getLastMarkedRecordLocation() {
|
457
|
6
|
return lastMark;
|
458
|
|
}
|
459
|
|
|
460
|
40
|
public Location getNextAppendLocation() {
|
461
|
40
|
return new Location(appendNode.getId(), appendNode.getAppendOffset());
|
462
|
|
}
|
463
|
|
|
464
|
|
|
465
|
|
|
466
|
|
|
467
|
2
|
public int getOnlineLogFileCount() {
|
468
|
2
|
return onlineLogFileCount;
|
469
|
|
}
|
470
|
|
|
471
|
0
|
public boolean isPastHalfActive() {
|
472
|
0
|
return (onlineLogFileCount/2.f) < activeLogFileCount.get();
|
473
|
|
}
|
474
|
|
|
475
|
0
|
synchronized public Location getFirstRecordLocationOfSecondActiveLogFile() {
|
476
|
0
|
return firstActiveNode.getNextActive().getFirstRecordLocation();
|
477
|
|
}
|
478
|
|
|
479
|
10
|
synchronized public boolean canActivateNextLogFile() {
|
480
|
10
|
return firstInactiveNode!=null;
|
481
|
|
}
|
482
|
|
|
483
|
|
}
|
484
|
|
|