81 lines
2.2 KiB
Java
81 lines
2.2 KiB
Java
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997, 1998
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* Sleepycat Software. All rights reserved.
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*
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* @(#)AppinitExample.java 10.3 (Sleepycat) 4/10/98
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*/
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package com.sleepycat.examples;
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import com.sleepycat.db.*;
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/*
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* An example of a program using DbEnv to configure its DB
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* environment.
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*
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* For comparison purposes, this example uses a similar structure
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* as examples/ex_appinit.c and examples_cxx/AppinitExample.cpp.
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*/
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class AppinitExample
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{
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private static final String progname = "AppinitExample";
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private static final String DATABASE_HOME = "/home/database";
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private static DbEnv init()
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throws DbException
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{
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DbEnv dbenv = new DbEnv();
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String config[] = new String[1];
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// Output errors to the application's log.
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//
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dbenv.set_error_stream(System.err);
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dbenv.set_errpfx(progname);
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//
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// All of the shared database files live in /home/database,
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// but data files live in /database.
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//
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// In C/C++ we need to allocate two elements in the array
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// and set config[1] to NULL. This is not necessary in Java.
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//
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config[0] = "DB_DATA_DIR /database/files";
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//
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// We want to specify the shared memory buffer pool cachesize,
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// but everything else is the default.
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//
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dbenv.set_mp_size(64 * 1024);
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//
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// We have multiple processes reading/writing these files, so
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// we need concurrency control and a shared buffer pool, but
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// not logging or transactions.
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//
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// appinit() will throw on error.
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//
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dbenv.appinit(DATABASE_HOME, config,
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Db.DB_CREATE | Db.DB_INIT_LOCK | Db.DB_INIT_MPOOL);
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return dbenv;
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}
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static public void main(String[] args)
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{
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System.out.println("beginning appinit");
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try {
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DbEnv dbenv = init();
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// ... your application here ...
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dbenv.appexit();
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}
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catch (DbException dbe) {
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System.err.println(progname + ": db_appinit: " + dbe.toString());
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System.exit (1);
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}
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System.out.println("completed appinit");
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}
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}
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