annotate src/goodjava/lucene/backup/BackupIndexWriter.java @ 1531:fa39e3c356ae

minor
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 02 Aug 2020 16:44:38 -0600
parents 31b543826ca9
children 634f6765830e
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1 package goodjava.lucene.backup;
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2
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3 import java.io.File;
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4 import java.io.InputStream;
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5 import java.io.IOException;
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6 import java.net.Socket;
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7 import java.util.List;
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8 import java.util.ArrayList;
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9 import java.util.Map;
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10 import java.util.HashMap;
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11 import java.util.Arrays;
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12 import java.util.concurrent.Executors;
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13 import java.util.concurrent.ExecutorService;
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14 import org.apache.lucene.search.SortField;
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15 import goodjava.io.IoUtils;
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16 import goodjava.rpc.RpcClient;
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17 import goodjava.rpc.RpcCall;
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18 import goodjava.rpc.RpcResult;
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19 import goodjava.rpc.RpcException;
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20 import goodjava.lucene.api.LuceneIndexWriter;
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21 import goodjava.logging.Logger;
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22 import goodjava.logging.LoggerFactory;
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23 import goodjava.lucene.logging.LoggingIndexWriter;
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24 import goodjava.lucene.logging.LogFile;
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25
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26
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27 public class BackupIndexWriter extends LoggingIndexWriter {
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28 private static final Logger logger = LoggerFactory.getLogger(BackupIndexWriter.class);
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29 public static String[] backupDomains;
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30 private final String name;
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31 private final String password;
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32 private final File dir;
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33 private boolean isSyncPending = false;
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34 private final ExecutorService exec = Executors.newSingleThreadExecutor();
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35
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36 public BackupIndexWriter(LuceneIndexWriter indexWriter,File logDir,String name,String password) throws IOException {
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37 super(indexWriter,logDir);
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38 if( backupDomains == null )
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39 throw new RuntimeException("must set backupDomains");
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40 this.name = name;
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41 this.password = password;
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42 File f = new File(System.getProperty("java.io.tmpdir"));
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43 dir = new File(f,"goodjava.lucene/"+name);
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44 IoUtils.mkdirs(dir);
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45 }
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46
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47 public synchronized void close() throws IOException {
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48 super.close();
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49 exec.shutdown();
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50 }
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51
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52 public synchronized void commit() throws IOException {
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53 super.commit();
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54 //sync();
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55 if( !isSyncPending ) {
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56 exec.execute(sync);
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57 isSyncPending = true;
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58 }
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59 }
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60
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61 protected void doCheck(SortField sortField) throws IOException {
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62 super.doCheck(sortField);
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63 runSyncWithChecksum();
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64 }
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65
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66 public void runSync() {
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67 try {
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68 exec.submit(sync).get();
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69 } catch(Exception e) {
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70 throw new RuntimeException(e);
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71 }
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72 }
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73
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74 public void runSyncWithChecksum() {
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75 try {
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76 exec.submit(syncWithChecksum).get();
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77 } catch(Exception e) {
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78 throw new RuntimeException(e);
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79 }
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80 }
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81
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82 private final Runnable sync = new Runnable() {
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83 public void run() {
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84 try {
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85 sync(false);
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86 } catch(IOException e) {
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87 throw new RuntimeException(e);
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88 }
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89 }
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90 };
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91
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92 private final Runnable syncWithChecksum = new Runnable() {
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93 public void run() {
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94 try {
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95 sync(true);
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96 } catch(IOException e) {
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97 throw new RuntimeException(e);
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98 }
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99 }
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100 };
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101
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102 private void sync(boolean withChecksum) throws IOException {
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103 List<LogFile> logs = new ArrayList<LogFile>();
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104 synchronized(this) {
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105 isSyncPending = false;
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106 clearDir();
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107 for( LogFile log : this.logs ) {
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108 File f = new File(dir,log.file.getName());
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109 IoUtils.link(log.file,f);
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110 logs.add( new LogFile(f) );
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111 }
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112 }
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113 List logInfo = new ArrayList();
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114 Map<String,LogFile> logMap = new HashMap<String,LogFile>();
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115 for( LogFile log : logs ) {
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116 Map fileInfo = new HashMap();
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117 fileInfo.put("name",log.file.getName());
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118 fileInfo.put("end",log.end());
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119 if( withChecksum )
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120 fileInfo.put("checksum",log.checksum());
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121 logInfo.add(fileInfo);
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122 logMap.put(log.file.getName(),log);
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123 }
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124 for( String backupDomain : backupDomains ) {
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125 RpcClient rpc = BackupServer.rpcClient(backupDomain);
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126 try {
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127 RpcCall call = new RpcCall("login",name,password);
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128 rpc.write(call);
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129 rpc.read();
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130 call = new RpcCall("check",logInfo);
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131 while(true) {
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132 rpc.write(call);
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133 RpcResult result = rpc.read();
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134 //logger.info(Arrays.asList(result.returnValues).toString());
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135 String status = (String)result.returnValues[0];
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136 if( status.equals("ok") ) {
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137 break;
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138 } else if( status.equals("missing") || status.equals("bad_checksum") ) {
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139 String fileName = (String)result.returnValues[1];
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140 if( status.equals("bad_checksum") )
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141 logger.error("bad_checksum "+fileName);
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142 LogFile log = logMap.get(fileName);
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143 long len = log.end() - 8;
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144 InputStream in = log.input();
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145 call = new RpcCall(in,len,"add",logInfo,fileName);
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146 } else if( status.equals("incomplete") ) {
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147 String fileName = (String)result.returnValues[1];
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148 long logEnd = (Long)result.returnValues[2];
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149 LogFile log = logMap.get(fileName);
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150 long len = log.end() - logEnd;
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151 InputStream in = log.input();
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152 in.skip(logEnd-8);
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153 call = new RpcCall(in,len,"append",logInfo,fileName);
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154 } else
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155 throw new RuntimeException("status "+status);
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156 }
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157 } catch(RpcException e) {
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158 logger.warn("",e);
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159 }
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160 rpc.close();
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161 }
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162 clearDir();
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163 }
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164
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165 private void clearDir() throws IOException {
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166 for( File f : dir.listFiles() ) {
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167 IoUtils.delete(f);
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168 }
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169 }
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170
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171 }