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annotate src/goodjava/lucene/logging/LogFile.java @ 1492:aaac1d29edea

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better io
author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 02 May 2020 22:25:56 -0600
parents 9a2a2181a58f
children 86c5e7000ecf
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1 package goodjava.lucene.logging;
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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.OutputStream;
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6 import java.io.BufferedOutputStream;
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7 import java.io.RandomAccessFile;
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8 import java.io.FileInputStream;
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9 import java.io.FileOutputStream;
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10 import java.io.IOException;
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11 import goodjava.logging.Logger;
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12 import goodjava.logging.LoggerFactory;
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13 import goodjava.io.FixedLengthInputStream;
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14 import goodjava.io.BufferedInputStream;
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16
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17 public class LogFile {
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18 private static final Logger logger = LoggerFactory.getLogger(LogFile.class);
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19 public final File file;
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20 long end;
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21
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22 public LogFile(File file) throws IOException {
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23 this.file = file;
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24 RandomAccessFile raf = new RandomAccessFile(file,"rwd");
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25 if( raf.length() == 0 ) {
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26 end = 8;
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27 raf.writeLong(end);
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28 } else {
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29 raf.seek(0L);
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30 end = raf.readLong();
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31 raf.seek(end);
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32 }
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33 raf.close();
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34 }
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35
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36 public String toString() {
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37 return "LogFile<" + file.getName() + ">";
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38 }
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39
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40 public long end() {
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41 return end;
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42 }
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43
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44 public LogOutputStream output() throws IOException {
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45 RandomAccessFile raf = new RandomAccessFile(file,"rwd");
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46 OutputStream out = new FileOutputStream(raf.getFD());
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47 out = new BufferedOutputStream(out);
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48 return newLogOutputStream(raf,out);
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49 }
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50
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51 protected LogOutputStream newLogOutputStream(RandomAccessFile raf,OutputStream out) throws IOException {
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52 return new LogOutputStream(this,raf,out);
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53 }
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54
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55 public LogInputStream input() throws IOException {
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56 InputStream in = new FileInputStream(file);
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57 in = new FixedLengthInputStream(in,end);
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58 in = new BufferedInputStream(in);
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59 LogInputStream lis = newLogInputStream(in);
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60 lis.readLong(); // skip end
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61 return lis;
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62 }
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63
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64 protected LogInputStream newLogInputStream(InputStream in) {
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65 return new LogInputStream(in);
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66 }
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67
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68 static final int TYPE_NULL = 0;
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69 static final int TYPE_STRING = 1;
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70 static final int TYPE_INT = 2;
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71 static final int TYPE_LONG = 3;
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72 static final int TYPE_FLOAT = 4;
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73 static final int TYPE_DOUBLE = 5;
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74 static final int TYPE_BYTES = 6;
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75 static final int TYPE_LIST = 7;
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76 static final int TYPE_QUERY_MATCH_ALL_DOCS = 8;
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77 static final int TYPE_QUERY_TERM = 9;
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78 static final int TYPE_QUERY_PREFIX = 10;
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79 static final int TYPE_QUERY_WILDCARD = 11;
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80 static final int TYPE_QUERY_TERM_RANGE = 12;
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81 static final int TYPE_QUERY_PHRASE = 13;
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82 static final int TYPE_QUERY_NUMERIC_RANGE = 14;
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83 static final int TYPE_QUERY_BOOLEAN = 15;
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84 }