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authorKim Kibum <kb0929.kim@samsung.com>2012-05-21 17:40:46 +0900
committerKim Kibum <kb0929.kim@samsung.com>2012-05-21 17:40:46 +0900
commit2e082c838d2ca750f5daac6dcdabecc22dfd4e46 (patch)
tree01c1dd87d4cc0b62a655c0d768ff695d2d244728 /examples_java/src/db/SequenceExample.java
parenta86e3ca152fb414b376e64c449c201d762e414dd (diff)
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+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997-2009 Oracle. All rights reserved.
+ *
+ * $Id$
+ */
+
+package db;
+
+import com.sleepycat.db.*;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.PrintStream;
+
+class SequenceExample {
+ private static final int EXIT_SUCCESS = 0;
+ private static final int EXIT_FAILURE = 1;
+
+ public SequenceExample() {
+ }
+
+ public static void usage() {
+ System.out.println("usage: java " +
+ "db.SequenceExample [-r] [database]\n");
+ System.exit(EXIT_FAILURE);
+ }
+
+ public static void main(String[] argv) {
+ boolean removeExistingDatabase = false;
+ String databaseName = "access.db";
+
+ for (int i = 0; i < argv.length; i++) {
+ if (argv[i].equals("-r"))
+ removeExistingDatabase = true;
+ else if (argv[i].equals("-?"))
+ usage();
+ else if (argv[i].startsWith("-"))
+ usage();
+ else {
+ if ((argv.length - i) != 1)
+ usage();
+ databaseName = argv[i];
+ break;
+ }
+ }
+
+ try {
+ SequenceExample app = new SequenceExample();
+ app.run(removeExistingDatabase, databaseName);
+ } catch (DatabaseException dbe) {
+ System.err.println("SequenceExample: " + dbe.toString());
+ System.exit(EXIT_FAILURE);
+ } catch (FileNotFoundException fnfe) {
+ System.err.println("SequenceExample: " + fnfe.toString());
+ System.exit(EXIT_FAILURE);
+ }
+ System.exit(EXIT_SUCCESS);
+ }
+
+ public void run(boolean removeExistingDatabase, String databaseName)
+ throws DatabaseException, FileNotFoundException {
+
+ // Remove the previous database.
+ if (removeExistingDatabase)
+ new File(databaseName).delete();
+
+ // Create the database object.
+ // There is no environment for this simple example.
+ DatabaseConfig dbConfig = new DatabaseConfig();
+ dbConfig.setErrorStream(System.err);
+ dbConfig.setErrorPrefix("SequenceExample");
+ dbConfig.setType(DatabaseType.BTREE);
+ dbConfig.setAllowCreate(true);
+ Database table = new Database(databaseName, null, dbConfig);
+
+ SequenceConfig config = new SequenceConfig();
+ config.setAllowCreate(true);
+ DatabaseEntry key =
+ new DatabaseEntry("my_sequence".getBytes());
+ Sequence sequence = table.openSequence(null, key, config);
+
+ for (int i = 0; i < 10; i++) {
+ long seqnum = sequence.get(null, 1);
+ System.out.println("Got sequence number: " + seqnum);
+ }
+
+ sequence.close();
+ table.close();
+ }
+}