如何在Weblogic的全局事务执行多线程操作
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3:因为涉及到多线程,主线程需要决定何时提交或回滚事务,这个我们要自己要实现一个线程结果检查的方法(checkCompletion())。
下面就是我自己实现的测试代码,在Weblogic81测试没有问题。
1 package weblogic.transaction.internal;
2
3 import weblogic.transaction.TxHelper;
4 import weblogic.transaction.internal.TransactionManagerImpl;
5 import javax.transaction.Transaction;
6 import java.util.ArrayList;
7
8 public class DriverTest {
9
10 private static String INITIAL_CONTEXT_FACTORY = "weblogic.jndi.WLInitialContextFactory";
11 private static String PROVIDER_URL = "t3://localhost:8001";
12 private static String SQL_INSERT = "insert into test values(?)";
13 private static String ANO_SQL_INSERT = "insert into test1 values(?)";
14
15 public static void main(String args[])
16 {
17 DriverTest test = new DriverTest();
18 test.multiThreadXATest();
19 }
20
21 private Connection getConnection(String url, String dsName) throws NamingException, SQLException
22 {
23 InitialContext ctx = initializeEnv(url);
24 DataSource ds = (DataSource)ctx.lookup(dsName);
25 ctx.close();
26 return ds.getConnection();
27 }
28
29 private UserTransaction getUserTransaction() throws NamingException, SQLException
30 {
31 InitialContext ctx = initializeEnv(null);
32 return (UserTransaction)ctx.lookup("javax/transaction/UserTransaction");
33 }
34
35 private InitialContext initializeEnv(String url) throws NamingException
36 {
37 Properties prop = new Properties();
38 if(url == null)
39 prop.put(Context.PROVIDER_URL, PROVIDER_URL);
40 else
41 prop.put(Context.PROVIDER_URL, url);
42 prop.put(Context.INITIAL_CONTEXT_FACTORY, INITIAL_CONTEXT_FACTORY);
43 return new InitialContext(prop);
44 }
45
46 private void executeInsertInPSMT(Connection conn, String sql)
47 {
48 PreparedStatement pstmt = null;
49 try{
50 pstmt = conn.prepareStatement(sql);
51 pstmt.setString(1, "data_to_insert");
52 pstmt.executeUpdate();
53 pstmt.close();
54 }catch(SQLException e){
55 e.printStackTrace();
56 }
57 }
58
59 public void multiThreadXATest()
60 {
61 ArrayList result = new ArrayList();
62 try{
63 UserTransaction userTx = getUserTransaction();
64 userTx.setTransactionTimeout(1000);
65 userTx.begin();
66 Transaction tx = TxHelper.getTransaction();
67 Connection conn = getConnection("t3://localhost:8011", "TestXADS");
68 if(conn != null) conn.close();
SQLThread thread1 = new SQLThread(tx,result,"t3://localhost:8011","TestXADS", SQL_INSERT);
69 SQLThread thread2 = new SQLThread(tx,result,"t3://localhost:8021","TestXADS_1", ANO_SQL_INSERT);
70 thread1.start();
71 thread2.start();
72 while(result.size() != 2){
73 Thread.currentThread().sleep(1);
74 }
75 if(checkCompletion(result)){
76 userTx.commit();
77 }
78 else{
79 userTx.rollback();
80 }
81 }catch(Exception e){
82 e.printStackTrace();
83 }
84 }
85
86 private boolean checkCompletion(ArrayList result){
87 boolean toReturn = true;
88 for(int loop=0; loop<result.size(); loop++){
89 if((!((String)result.get(loop)).equals("OK"))){
90 toReturn = false;
91 break;
92 }
93 }
94 return toReturn;
95 }
96
97 class SQLThread extends weblogic.kernel.AuditableThread {
98
99 private Transaction tx = null;
100 private ArrayList result = null;
101 private String dsName = null;
102 private String url = null;
103 private String sql = null;
104
105 public SQLThread(Transaction tx,ArrayList result,String ds, String url, String sql){
106 this.tx = tx;
107 this.result = result;
108 this.dsName = ds;
109 this.url = url;
110 this.sql = sql;
111 }
112
113 public void run(){
114 Connection conn = null;
115 try{
116 TransactionManagerImpl tm = (TransactionManagerImpl)TransactionManagerImpl.getTransactionManager();
117 tm.internalResume((TransactionImpl)tx);
118 DriverTest test = new DriverTest();
119 conn = test.getConnection(url, dsName);
120 test.executeInsertInPSMT(conn, sql);
121 conn.close();
122 tm.internalSuspend();
123 result.add("OK");
124 }catch(Exception e){
125 result.add("NA");
126 e.printStackTrace();
127 }finally{
128 try{
129 if(conn != null)
130 conn.close();
131 }catch(Exception e){
132 e.printStackTrace();
133 }
134 }
135 }
136 }
137 }
138
139
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