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18 package org.apache.activemq.kaha.impl.data;
19
20 import java.io.File  ;
21 import java.io.FileNotFoundException ;
22 import java.io.IOException ;
23 import java.io.RandomAccessFile ;
24
29 class DataFile{
30
31 private File file;
32 private Integer number;
33 private int referenceCount;
34 private RandomAccessFile randomAcessFile;
35 private Object writerData;
36 long length=0;
37 private boolean dirty;
38
39 DataFile(File file,int number){
40 this.file=file;
41 this.number=new Integer (number);
42 length=file.exists()?file.length():0;
43 }
44
45 Integer getNumber(){
46 return number;
47 }
48
49 synchronized RandomAccessFile getRandomAccessFile() throws FileNotFoundException {
50 if(randomAcessFile==null){
51 randomAcessFile=new RandomAccessFile (file,"rw");
52 }
53 return randomAcessFile;
54 }
55
56 synchronized long getLength(){
57 return length;
58 }
59
60 synchronized void incrementLength(int size){
61 length+=size;
62 }
63
64 synchronized void purge() throws IOException {
65 if(randomAcessFile!=null){
66 randomAcessFile.close();
67 randomAcessFile=null;
68 }
69 }
70
71 synchronized boolean delete() throws IOException {
72 purge();
73 return file.delete();
74 }
75
76 synchronized void close() throws IOException {
77 if(randomAcessFile!=null){
78 randomAcessFile.close();
79 }
80 }
81
82 synchronized int increment(){
83 return ++referenceCount;
84 }
85
86 synchronized int decrement(){
87 return --referenceCount;
88 }
89
90 synchronized boolean isUnused(){
91 return referenceCount<=0;
92 }
93
94 public String toString(){
95 String result = file.getName() + " number = " + number + " , length = " + length + " refCount = " + referenceCount;
96 return result;
97 }
98
99
102 public synchronized Object getWriterData() {
103 return writerData;
104 }
105
106
109 public synchronized void setWriterData(Object writerData) {
110 this.writerData = writerData;
111 dirty=true;
112 }
113
114 public synchronized boolean isDirty() {
115 return dirty;
116 }
117
118 public synchronized void setDirty(boolean value) {
119 this.dirty = value;
120 }
121
122 }
123 |
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