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1
21 package com.db4o.inside.replication;
22
23 import com.db4o.*;
24 import com.db4o.foundation.Hashtable4;
25
26
29 public class MigrationConnection {
30
31 public final YapStream _peerA;
32 public final YapStream _peerB;
33
34 private final Hashtable4 _referenceMap;
35 private final Hashtable4 _identityMap;
36
37 public MigrationConnection(YapStream peerA, YapStream peerB) {
38 _referenceMap = new Hashtable4();
39 _identityMap = new Hashtable4();
40 _peerA = peerA;
41 _peerB = peerB;
42 }
43
44 public void mapReference(Object  obj, YapObject ref) {
45
46
48
50
56 _referenceMap.put(System.identityHashCode(obj), ref);
57 }
58
59 public void mapIdentity(Object obj, Object otherObj) {
60 _identityMap.put(System.identityHashCode(obj), otherObj);
61 }
62
63
64 public YapObject referenceFor(Object obj) {
65 int hcode = System.identityHashCode(obj);
66 YapObject ref = (YapObject) _referenceMap.get(hcode);
67 _referenceMap.remove(hcode);
68 return ref;
69 }
70
71 public Object identityFor(Object obj) {
72 int hcode = System.identityHashCode(obj);
73 return _identityMap.get(hcode);
74 }
75
76
77 public void terminate(){
78 _peerA.migrateFrom(null);
79 _peerB.migrateFrom(null);
80 }
81
82 public YapStream peer(YapStream stream){
83 if(_peerA == stream){
84 return _peerB;
85 }
86 return _peerA;
87 }
88
89
90
91 }
92
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