Mercurial Hosting > luan
annotate src/goodjava/lucene/backup/BackupIndexWriter.java @ 1674:af18eacf187c
automatic restore
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sun, 29 May 2022 23:38:34 -0600 |
| parents | 1b9f9fdb3b41 |
| children | 445048f9eca7 |
| rev | line source |
|---|---|
| 1488 | 1 package goodjava.lucene.backup; |
| 2 | |
| 3 import java.io.File; | |
| 1499 | 4 import java.io.InputStream; |
| 1674 | 5 import java.io.OutputStream; |
| 6 import java.io.BufferedOutputStream; | |
| 7 import java.io.FileOutputStream; | |
| 1488 | 8 import java.io.IOException; |
| 1499 | 9 import java.net.Socket; |
| 1672 | 10 import java.net.ConnectException; |
| 1488 | 11 import java.util.List; |
| 12 import java.util.ArrayList; | |
| 1499 | 13 import java.util.Map; |
| 14 import java.util.HashMap; | |
| 15 import java.util.Arrays; | |
| 1504 | 16 import java.util.concurrent.Executors; |
| 17 import java.util.concurrent.ExecutorService; | |
| 1672 | 18 import java.util.concurrent.ExecutionException; |
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19 import org.apache.lucene.search.SortField; |
| 1488 | 20 import goodjava.io.IoUtils; |
| 1499 | 21 import goodjava.rpc.RpcClient; |
| 22 import goodjava.rpc.RpcCall; | |
| 23 import goodjava.rpc.RpcResult; | |
| 24 import goodjava.rpc.RpcException; | |
| 1488 | 25 import goodjava.lucene.api.LuceneIndexWriter; |
| 26 import goodjava.lucene.logging.LoggingIndexWriter; | |
| 27 import goodjava.lucene.logging.LogFile; | |
| 1672 | 28 import goodjava.logging.Logger; |
| 29 import goodjava.logging.LoggerFactory; | |
| 1488 | 30 |
| 31 | |
| 1672 | 32 public final class BackupIndexWriter extends LoggingIndexWriter { |
| 1499 | 33 private static final Logger logger = LoggerFactory.getLogger(BackupIndexWriter.class); |
| 34 public static String[] backupDomains; | |
| 1488 | 35 private final String name; |
| 36 private final File dir; | |
| 1499 | 37 private boolean isSyncPending = false; |
| 1504 | 38 private final ExecutorService exec = Executors.newSingleThreadExecutor(); |
| 1488 | 39 |
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40 public BackupIndexWriter(LuceneIndexWriter indexWriter,File logDir,long logTime,String name) |
| 1548 | 41 throws IOException |
| 42 { | |
| 43 super(indexWriter,logDir,logTime); | |
| 1499 | 44 if( backupDomains == null ) |
| 45 throw new RuntimeException("must set backupDomains"); | |
| 1488 | 46 this.name = name; |
| 47 File f = new File(System.getProperty("java.io.tmpdir")); | |
| 48 dir = new File(f,"goodjava.lucene/"+name); | |
| 1501 | 49 IoUtils.mkdirs(dir); |
| 1488 | 50 } |
| 51 | |
| 1672 | 52 @Override public synchronized void close() throws IOException { |
| 1504 | 53 super.close(); |
| 54 exec.shutdown(); | |
| 55 } | |
| 56 | |
| 1672 | 57 @Override public synchronized void commit() throws IOException { |
| 1488 | 58 super.commit(); |
| 1499 | 59 //sync(); |
| 60 if( !isSyncPending ) { | |
| 1504 | 61 exec.execute(sync); |
| 1499 | 62 isSyncPending = true; |
| 1488 | 63 } |
| 64 } | |
| 65 | |
| 1672 | 66 @Override protected boolean doCheck(SortField sortField) throws IOException { |
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67 boolean ok = super.doCheck(sortField); |
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68 if( ok ) |
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69 runSyncWithChecksum(); |
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70 return ok; |
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71 } |
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72 |
| 1499 | 73 public void runSync() { |
| 1672 | 74 exec(sync); |
| 1499 | 75 } |
| 76 | |
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parents:
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77 public void runSyncWithChecksum() { |
| 1672 | 78 exec(syncWithChecksum); |
| 79 } | |
| 80 | |
| 81 private void exec(Runnable r) { | |
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82 try { |
| 1672 | 83 exec.submit(r).get(); |
| 84 } catch(InterruptedException e) { | |
| 85 throw new RuntimeException(e); | |
| 86 } catch(ExecutionException e) { | |
| 87 Throwable cause = e.getCause(); | |
| 88 if( cause instanceof RuntimeException ) | |
| 89 throw (RuntimeException)cause; | |
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90 throw new RuntimeException(e); |
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91 } |
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92 } |
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93 |
| 1499 | 94 private final Runnable sync = new Runnable() { |
| 1504 | 95 public void run() { |
| 1499 | 96 try { |
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97 sync(false); |
| 1672 | 98 } catch(ConnectException e) { |
| 99 logger.error("sync failed: "+e.getMessage()); | |
| 1499 | 100 } catch(IOException e) { |
| 101 throw new RuntimeException(e); | |
| 102 } | |
| 103 } | |
| 104 }; | |
| 105 | |
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parents:
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106 private final Runnable syncWithChecksum = new Runnable() { |
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parents:
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107 public void run() { |
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108 try { |
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109 sync(true); |
| 1672 | 110 } catch(ConnectException e) { |
| 111 logger.error("syncWithChecksum failed: "+e.getMessage()); | |
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112 } catch(IOException e) { |
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113 throw new RuntimeException(e); |
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114 } |
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parents:
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115 } |
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116 }; |
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117 |
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parents:
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diff
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118 private void sync(boolean withChecksum) throws IOException { |
| 1499 | 119 List<LogFile> logs = new ArrayList<LogFile>(); |
| 120 synchronized(this) { | |
| 121 isSyncPending = false; | |
| 1500 | 122 clearDir(); |
| 1499 | 123 for( LogFile log : this.logs ) { |
| 124 File f = new File(dir,log.file.getName()); | |
| 125 IoUtils.link(log.file,f); | |
| 126 logs.add( new LogFile(f) ); | |
| 127 } | |
| 128 } | |
| 129 List logInfo = new ArrayList(); | |
| 130 Map<String,LogFile> logMap = new HashMap<String,LogFile>(); | |
| 131 for( LogFile log : logs ) { | |
| 132 Map fileInfo = new HashMap(); | |
| 133 fileInfo.put("name",log.file.getName()); | |
| 134 fileInfo.put("end",log.end()); | |
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parents:
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135 if( withChecksum ) |
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parents:
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136 fileInfo.put("checksum",log.checksum()); |
| 1499 | 137 logInfo.add(fileInfo); |
| 138 logMap.put(log.file.getName(),log); | |
| 139 } | |
| 140 for( String backupDomain : backupDomains ) { | |
| 1509 | 141 RpcClient rpc = BackupServer.rpcClient(backupDomain); |
| 1499 | 142 try { |
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parents:
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diff
changeset
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143 RpcCall call = new RpcCall("login",name); |
| 1512 | 144 rpc.write(call); |
| 145 rpc.read(); | |
| 146 call = new RpcCall("check",logInfo); | |
| 1499 | 147 while(true) { |
| 148 rpc.write(call); | |
| 149 RpcResult result = rpc.read(); | |
| 1512 | 150 //logger.info(Arrays.asList(result.returnValues).toString()); |
| 1499 | 151 String status = (String)result.returnValues[0]; |
| 152 if( status.equals("ok") ) { | |
| 153 break; | |
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parents:
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diff
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154 } else if( status.equals("missing") || status.equals("bad_checksum") ) { |
| 1499 | 155 String fileName = (String)result.returnValues[1]; |
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parents:
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diff
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156 if( status.equals("bad_checksum") ) |
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parents:
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diff
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157 logger.error("bad_checksum "+fileName); |
| 1499 | 158 LogFile log = logMap.get(fileName); |
| 159 long len = log.end() - 8; | |
| 160 InputStream in = log.input(); | |
| 1512 | 161 call = new RpcCall(in,len,"add",logInfo,fileName); |
| 1499 | 162 } else if( status.equals("incomplete") ) { |
| 163 String fileName = (String)result.returnValues[1]; | |
| 164 long logEnd = (Long)result.returnValues[2]; | |
| 165 LogFile log = logMap.get(fileName); | |
| 166 long len = log.end() - logEnd; | |
| 167 InputStream in = log.input(); | |
| 168 in.skip(logEnd-8); | |
| 1512 | 169 call = new RpcCall(in,len,"append",logInfo,fileName); |
| 1499 | 170 } else |
| 171 throw new RuntimeException("status "+status); | |
| 172 } | |
| 173 } catch(RpcException e) { | |
| 1672 | 174 logger.error("",e); |
| 1499 | 175 } |
| 176 rpc.close(); | |
| 177 } | |
| 1500 | 178 clearDir(); |
| 179 } | |
| 180 | |
| 181 private void clearDir() throws IOException { | |
| 182 for( File f : dir.listFiles() ) { | |
| 183 IoUtils.delete(f); | |
| 184 } | |
| 1499 | 185 } |
| 186 | |
| 1674 | 187 public static BackupIndexWriter newWithRestore(LuceneIndexWriter indexWriter,File logDir,long logTime,String name) |
| 188 throws IOException | |
| 189 { | |
| 190 if( !logDir.exists() ) { | |
| 191 RpcClient rpc = BackupServer.rpcClient(backupDomains[0]); | |
| 192 try { | |
| 193 RpcCall call; | |
| 194 RpcResult result; | |
| 195 call = new RpcCall("exists",name); | |
| 196 rpc.write(call); | |
| 197 result = rpc.read(); | |
| 198 boolean exists = (Boolean)result.returnValues[0]; | |
| 199 if( exists ) { | |
| 200 logger.error("restoring "+logDir+" from backup"); | |
| 201 File zip = File.createTempFile("luan_",".zip"); | |
| 202 IoUtils.delete(zip); | |
| 203 call = new RpcCall("login",name); | |
| 204 rpc.write(call); | |
| 205 rpc.read(); | |
| 206 call = new RpcCall("zip"); | |
| 207 rpc.write(call); | |
| 208 result = rpc.read(); | |
| 209 OutputStream out = new BufferedOutputStream(new FileOutputStream(zip)); | |
| 210 IoUtils.copyAll(result.in,out); | |
| 211 out.close(); | |
| 212 IoUtils.mkdirs(logDir); | |
| 213 String cmd = "unzip " + zip; | |
| 214 Process proc = Runtime.getRuntime().exec(cmd,null,logDir); | |
| 215 IoUtils.waitFor(proc); | |
| 216 IoUtils.delete(zip); | |
| 217 } | |
| 218 } catch(RpcException e) { | |
| 219 throw new RuntimeException(e); | |
| 220 } | |
| 221 rpc.close(); | |
| 222 } | |
| 223 return new BackupIndexWriter(indexWriter,logDir,logTime,name); | |
| 224 } | |
| 225 | |
| 1488 | 226 } |