forked from oracle-samples/oracle-db-examples
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathUCPMultiUsers.java
More file actions
executable file
·172 lines (140 loc) · 5.31 KB
/
UCPMultiUsers.java
File metadata and controls
executable file
·172 lines (140 loc) · 5.31 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.*/
/*
* DESCRIPTION
*
* This code sample illustrates how JDBC applications use the Oracle
* Universal Connection Pool (UCP) to pool connections for different
* users.
*
* It is required that applications have both ucp.jar and Oracle JDBC
* driver jar(s) (such as ojdbc8.jar or ojdbc7.jar) on the classpath,
* and that the database backend supports SQL (this sample uses an
* Oracle Database and the default HR schema).
*
* To run the sample, you must provide non-default and working values
* for ALL 3 of user, password, and URL. This can be done by either updating
* this file directly or supplying the 3 values as command-line options
* and user input. The password is read from console or standard input.
* java UCPMultiUsers -l <url> -u <user>
* If you do not update all the defaults, the program proceeds but
* will hit error when connecting.
*/
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import oracle.ucp.jdbc.PoolDataSourceFactory;
import oracle.ucp.jdbc.PoolDataSource;
public class UCPMultiUsers {
final static String DEFAULT_URL = "jdbc:oracle:thin:@//myhost:myport/myservice";
final static String DEFAULT_USER = "myuser";
final static String DEFAULT_PASSWORD = "mypassword";
final static String CONN_FACTORY_CLASS = "oracle.jdbc.pool.OracleDataSource";
// You must provide non-default values for ALL 3 to execute the program
static String url = DEFAULT_URL;
static String user = DEFAULT_USER;
static String password = DEFAULT_PASSWORD;
// Modify these if user "scott" is locked in DB.
final static String USER2 = "scott";
final static String PASSWORD2 = "tiger";
public static void main(String args[]) throws Exception {
getRealUserPasswordUrl(args);
show("\nUCPMultiUsers starts");
// See sample UCPBasic for basic steps to set up a pool.
PoolDataSource pds = PoolDataSourceFactory.getPoolDataSource();
pds.setConnectionFactoryClassName(CONN_FACTORY_CLASS);
pds.setURL(url);
pds.setUser(user);
pds.setPassword(password);
pds.setConnectionPoolName("UCPMultiUsers_pool");
show("Connection pool configured");
try (Connection conn1 = pds.getConnection()) {
showPoolStatistics("\nAfter checkout for "+user, pds);
makeJDBCCalls(conn1);
} catch (SQLException exc) {
showError("Checkout with "+user, exc);
}
showPoolStatistics("\nAfter checkin for "+user, pds);
// Use this version of getConnection with different users.
try (Connection conn2 = pds.getConnection(USER2, PASSWORD2)) {
showPoolStatistics("\nAfter checkout for "+USER2, pds);
makeJDBCCalls(conn2);
} catch (SQLException exc) {
showError("Checkout with "+USER2, exc);
}
showPoolStatistics("\nAfter checkin for "+USER2, pds);
show("\nUCPMultiUsers completes");
}
// Simple query
static void makeJDBCCalls(Connection conn) {
try (Statement statement = conn.createStatement()) {
try (java.sql.ResultSet rset = statement.executeQuery("SELECT USER FROM DUAL")) {
rset.next();
show("\n Current user: " + rset.getString(1));
}
} catch (SQLException exc) {
showError("JDBC operation", exc);
}
}
static void showPoolStatistics(String prompt, PoolDataSource pds)
throws SQLException {
show(prompt + " -");
show(" Available connections: " + pds.getAvailableConnectionsCount());
show(" Borrowed connections: " + pds.getBorrowedConnectionsCount());
}
static void show(String msg) {
System.out.println(msg);
}
static void showError(String msg, Throwable exc) {
System.err.println(msg + " hit error: " + exc.getMessage());
}
static void getRealUserPasswordUrl(String args[]) throws Exception {
// URL can be modified in file, or taken from command-line
url = getOptionValue(args, "-l", DEFAULT_URL);
// DB user can be modified in file, or taken from command-line
user = getOptionValue(args, "-u", DEFAULT_USER);
// DB user's password can be modified in file, or explicitly entered
readPassword(" Password for " + user + ": ");
}
// Get specified option value from command-line.
static String getOptionValue(
String args[], String optionName, String defaultVal) {
String argValue = "";
try {
int i = 0;
String arg = "";
boolean found = false;
while (i < args.length) {
arg = args[i++];
if (arg.equals(optionName)) {
if (i < args.length)
argValue = args[i++];
if (argValue.startsWith("-") || argValue.equals("")) {
argValue = defaultVal;
}
found = true;
}
}
if (!found) {
argValue = defaultVal;
}
} catch (Exception e) {
showError("getOptionValue", e);
}
return argValue;
}
static void readPassword(String prompt) throws Exception {
if (System.console() != null) {
char[] pchars = System.console().readPassword("\n[%s]", prompt);
if (pchars != null) {
password = new String(pchars);
java.util.Arrays.fill(pchars, ' ');
}
} else {
BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
show(prompt);
password = r.readLine();
}
}
}