Import of Sleepycat DB 2.4.14.1

1998-10-15 03:56:37 +00:00
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+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997, 1998
+ *	Sleepycat Software.  All rights reserved.
+ *
+ *	@(#)AppinitExample.java	10.3 (Sleepycat) 4/10/98
+ */
+
+package com.sleepycat.examples;
+
+import com.sleepycat.db.*;
+
+/*
+ * An example of a program using DbEnv to configure its DB
+ * environment.
+ *
+ * For comparison purposes, this example uses a similar structure
+ * as examples/ex_appinit.c and examples_cxx/AppinitExample.cpp.
+ */
+class AppinitExample
+{
+    private static final String progname = "AppinitExample";
+    private static final String DATABASE_HOME = "/home/database";
+
+    private static DbEnv init()
+         throws DbException
+    {
+        DbEnv dbenv = new DbEnv();
+        String config[] = new String[1];
+
+        // Output errors to the application's log.
+        //
+        dbenv.set_error_stream(System.err);
+        dbenv.set_errpfx(progname);
+
+        //
+        // All of the shared database files live in /home/database,
+        // but data files live in /database.
+        //
+        // In C/C++ we need to allocate two elements in the array
+        // and set config[1] to NULL.  This is not necessary in Java.
+        //
+        config[0] = "DB_DATA_DIR /database/files";
+
+        //
+        // We want to specify the shared memory buffer pool cachesize,
+        // but everything else is the default.
+        //
+        dbenv.set_mp_size(64 * 1024);
+
+        //
+        // We have multiple processes reading/writing these files, so
+        // we need concurrency control and a shared buffer pool, but
+        // not logging or transactions.
+        //
+        // appinit() will throw on error.
+        //
+        dbenv.appinit(DATABASE_HOME, config,
+                      Db.DB_CREATE | Db.DB_INIT_LOCK | Db.DB_INIT_MPOOL);
+        return dbenv;
+    }
+
+    static public void main(String[] args)
+    {
+	System.out.println("beginning appinit");
+        try {
+            DbEnv dbenv = init();
+
+            // ... your application here ...
+
+            dbenv.appexit();
+        }
+        catch (DbException dbe) {
+            System.err.println(progname + ": db_appinit: " + dbe.toString());
+            System.exit (1);
+        }
+	System.out.println("completed appinit");
+    }
+}