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comparison src/fschmidt/db/pool/Pool.java @ 68:00520880ad02

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add fschmidt source
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 05 Oct 2025 17:24:15 -0600
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67:9d0fefce6985 68:00520880ad02
1 /*
2 Copyright (c) 2008 Franklin Schmidt <fschmidt@gmail.com>
3
4 Permission is hereby granted, free of charge, to any person obtaining a copy
5 of this software and associated documentation files (the "Software"), to deal
6 in the Software without restriction, including without limitation the rights
7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 copies of the Software, and to permit persons to whom the Software is
9 furnished to do so, subject to the following conditions:
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 THE SOFTWARE.
21 */
22
23 package fschmidt.db.pool;
24
25 import java.sql.Connection;
26 import java.sql.SQLException;
27 import java.sql.Statement;
28 import java.util.List;
29 import java.util.ArrayList;
30 import java.util.Set;
31 import java.util.HashSet;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
34 import fschmidt.db.DbDatabase;
35 import fschmidt.db.DbObject;
36 import fschmidt.db.DbKey;
37 import fschmidt.db.DbObjectFactory;
38 import fschmidt.db.SQLRuntimeException;
39 import fschmidt.db.extend.DbDatabaseExt;
40 import fschmidt.db.extend.DbTableExt;
41 import fschmidt.db.extend.DbTransaction;
42 import fschmidt.db.extend.DbRecordExt;
43 import fschmidt.db.extend.FilterDatabase;
44 import fschmidt.util.java.Stack;
45 import fschmidt.util.java.ArrayStack;
46
47
48 public final class Pool {
49 private static final Logger logger = LoggerFactory.getLogger(Pool.class);
50
51 final Stack<PooledConnection> stack = new ArrayStack<PooledConnection>();
52 private long idleTimeout = 0L;
53 private long idleExpires;
54 final ThreadLocal<PooledConnection> localCon = new ThreadLocal<PooledConnection>();
55
56 public long getIdleTimeout() {
57 return idleTimeout;
58 }
59
60 public void setIdleTimeout(long idleTimeout) {
61 this.idleTimeout = idleTimeout;
62 }
63
64 boolean isInTransaction() {
65 PooledConnection con = localCon.get();
66 return con!=null && con.isInTransaction();
67 }
68
69 void commitTransaction() {
70 localCon.get().commitTransaction();
71 }
72
73 void endTransaction() {
74 PooledConnection con = localCon.get();
75 if( con==null )
76 throw new IllegalStateException("endTransaction called without beginTransaction");
77 con.endTransaction();
78 }
79
80 void runBeforeCommit(Runnable r) {
81 PooledConnection con = localCon.get();
82 if( !con.ignoreRunnablesInThisTransaction )
83 con.beforeCommitList.add(r);
84 }
85
86 void runJustAfterCommit(Runnable r) {
87 PooledConnection con = localCon.get();
88 if( !con.ignoreRunnablesInThisTransaction )
89 con.afterCommitList.add(0,r);
90 }
91
92 void runAfterCommit(Runnable r) {
93 PooledConnection con = localCon.get();
94 if( !con.ignoreRunnablesInThisTransaction )
95 con.afterCommitList.add(r);
96 }
97
98 void ignoreRunnablesInThisTransaction() {
99 if( !isInTransaction() )
100 throw new IllegalStateException("not in transaction");
101 localCon.get().ignoreRunnablesInThisTransaction = true;
102 }
103
104 DbTransaction getTransaction() {
105 if( isInTransaction() ) {
106 return localCon.get().dbTrans;
107 } else {
108 return null;
109 }
110 }
111
112 Connection getConnection(DbDatabaseImpl db)
113 throws SQLException
114 {
115 PooledConnection con = localCon.get();
116 if( con==null || con.con().isClosed() ) {
117 con = getConnection2(db);
118 localCon.set(con);
119 pools.get().add(this);
120 }
121 return con.nest(db.user);
122 }
123
124 private static final long timeout = 1000L*60*60; // 1 hour
125
126 private synchronized PooledConnection getConnection2(DbDatabaseImpl db)
127 throws SQLException
128 {
129 long now = System.currentTimeMillis();
130 while( !stack.isEmpty() ) {
131 PooledConnection con = stack.pop();
132 Connection realCon = con.con();
133 if( realCon.isClosed() )
134 continue;
135 try {
136 if( now - con.lastUsed > timeout ) {
137 Statement stmt = realCon.createStatement();
138 stmt.executeQuery("select 1");
139 stmt.close();
140 }
141 } catch(SQLException e) {
142 logger.info("corrupt connection dropped from pool");
143 continue;
144 }
145 return con;
146 }
147 idleExpires = now + idleTimeout;
148 return new PooledConnection(db);
149 }
150
151 boolean isExpired(long lastUsed) {
152 return idleTimeout > 0 && lastUsed > idleExpires;
153 }
154
155 private static ThreadLocal<Set<Pool>> pools = new ThreadLocal<Set<Pool>>() {
156 protected Set<Pool> initialValue() {
157 return new HashSet<Pool>();
158 }
159 };
160
161 public static void threadReset() {
162 Set<Pool> set = pools.get();
163 for( Pool pool : set ) {
164 PooledConnection con = pool.localCon.get();
165 if( con != null ) {
166 con.forceClose();
167 }
168 }
169 set.clear();
170 }
171
172 public Connection getNativeConnection() {
173 return localCon.get().con();
174 }
175
176 }