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1
6
7 package org.jfox.tm;
8
9 import java.io.Serializable  ;
10 import java.net.InetAddress ;
11 import java.net.UnknownHostException ;
12 import javax.transaction.xa.Xid ;
13
14
17
18 public class XidImpl implements Xid , Serializable {
19 private static volatile int hash = 1;
20
21 public static final int FORMAT_ID = 0x0808;
22
23 private byte[] globalId = new byte[Xid.MAXGTRIDSIZE];
25 private byte[] branchId = new byte[Xid.MAXBQUALSIZE];
26
27 private static String host;
28
29 static {
30 try {
31 InetAddress local = InetAddress.getLocalHost();
32 host = local.getHostName() + "-" + local.getHostAddress();
33 }
34 catch(UnknownHostException e) {
35 host = "localhost-0.0.0.0";
36 }
37 }
38
39 public XidImpl() {
40 String xid = new StringBuffer ().append(host).append("-").append(hash++).toString();
41 if(xid.length() > Xid.MAXBQUALSIZE) {
42 xid = xid.substring(xid.length() - Xid.MAXBQUALSIZE);
43 }
44
45 byte[] _globalId = xid.getBytes();
46 if(_globalId.length > Xid.MAXGTRIDSIZE) {
47 System.arraycopy(_globalId, 0, globalId, _globalId.length - Xid.MAXGTRIDSIZE, Xid.MAXGTRIDSIZE);
48 }
49 else {
50 System.arraycopy(xid.getBytes(), 0, globalId, 0, xid.getBytes().length);
51 }
52 }
53
54 private XidImpl(byte[] _globalId, byte[] _branchId) {
55 if(_globalId.length > Xid.MAXGTRIDSIZE) {
56 System.arraycopy(_globalId, 0, globalId, _globalId.length - Xid.MAXGTRIDSIZE, Xid.MAXGTRIDSIZE);
57 }
58 else {
59 System.arraycopy(_globalId, 0, globalId, 0, _globalId.length);
60 }
61 if(_branchId.length > Xid.MAXBQUALSIZE) {
62 System.arraycopy(_branchId, 0, branchId, _branchId.length - Xid.MAXBQUALSIZE, Xid.MAXBQUALSIZE);
63 }
64 else {
65 System.arraycopy(_branchId, 0, branchId, 0, _branchId.length);
66 }
67
68 }
69
70 public static Xid createBranchXid(Xid xid, int branchId) {
71 return new XidImpl(xid.getGlobalTransactionId(), Integer.toString(branchId).getBytes());
72 }
73
74 public int getFormatId() {
75 return FORMAT_ID;
76 }
77
78 public byte[] getBranchQualifier() {
79 return branchId;
80 }
81
82 public byte[] getGlobalTransactionId() {
83 return globalId;
84 }
85
86 public int hashCode() {
87 return globalId.hashCode() + branchId.hashCode();
88 }
89
90 public String toString() {
91 return new StringBuffer ().append(new String (globalId).trim()).append(":").append(new String (branchId).trim()).toString();
92 }
93
94 public boolean equals(Object obj) {
95 if(!(obj instanceof XidImpl)) return false;
96
97 XidImpl xid2 = (XidImpl) obj;
98 if(FORMAT_ID == xid2.getFormatId()
99 && java.util.Arrays.equals(branchId, xid2.getBranchQualifier())
100 && java.util.Arrays.equals(globalId, xid2.getGlobalTransactionId())) {
101 return true;
102 }
103 else {
104 return false;
105 }
106 }
107
108 public static void main(String [] args) {
109 Xid xid = new XidImpl();
110 Xid xid1 = (XidImpl.createBranchXid(xid, 100));
111 Xid xid2 = (XidImpl.createBranchXid(xid, 100));
112 System.out.println(xid);
113 System.out.println(xid1);
114 System.out.println(xid1.equals(xid2));
115 }
116 }
117
118 |
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