Examples with Database org.cojen.tupl.Database used on opensource projects

Example 6 with Database

use of org.cojen.tupl.Database in project Tupl by cojen.

the class Shutdown method main.

/**
 * @param args a base file path for the database, and an optional cache size
 */
public static void main(String[] args) throws Exception {
    var config = new DatabaseConfig().createFilePath(false).baseFilePath(args[0]).eventListener(EventListener.printTo(System.out));
    if (args.length > 1) {
        config.minCacheSize(Long.parseLong(args[1]));
    }
    Database db = Database.open(config);
    DatabaseStats stats = db.stats();
    db.shutdown();
    System.out.println(stats);
}

Example 7 with Database

use of org.cojen.tupl.Database in project Tupl by cojen.

the class Verify method main.

/**
 * @param args first argument is a base file path for the database, second optional
 * argument is the cache size
 */
public static void main(String[] args) throws Exception {
    var config = new DatabaseConfig().createFilePath(false).baseFilePath(args[0]).eventListener(EventListener.printTo(System.out));
    if (args.length > 1) {
        config.minCacheSize(Long.parseLong(args[1]));
    }
    Database db = Database.open(config);
    System.out.println(db.stats());
    var v = new Verify();
    db.verify(v);
    System.out.println(v);
    System.exit(v.failed);
}

Example 8 with Database

use of org.cojen.tupl.Database in project Tupl by cojen.

the class DatabaseReplicatorTest method valueWriteRecover.

@Test
public void valueWriteRecover() throws Exception {
    // Verifies that a checkpoint in the middle of a value write on the replica can still
    // properly recover the registered cursor.
    Database[] dbs = startGroup(2, Role.OBSERVER, null);
    Database leaderDb = dbs[0];
    Database replicaDb = dbs[1];
    Index leaderIx = leaderDb.openIndex("test");
    var rnd = new Random();
    var part1 = new byte[1000];
    rnd.nextBytes(part1);
    var part2 = new byte[1000];
    rnd.nextBytes(part2);
    Transaction txn = leaderDb.newTransaction();
    byte[] key = "key1".getBytes();
    Cursor c = leaderIx.newAccessor(txn, key);
    c.valueWrite(0, part1, 0, part1.length);
    txn.flush();
    // Wait for replica to catch up.
    fence(leaderDb, replicaDb);
    Index replicaIx = replicaDb.openIndex("test");
    assertTrue(replicaIx.exists(Transaction.BOGUS, key));
    replicaDb.checkpoint();
    replicaDb = closeAndReopen(1);
    replicaIx = replicaDb.openIndex("test");
    assertTrue(replicaIx.exists(Transaction.BOGUS, key));
    // Finish writing and wait for replica to catch up.
    c.valueWrite(part1.length, part2, 0, part2.length);
    c.close();
    txn.commit();
    fence(leaderDb, replicaDb);
    var expect = new byte[part1.length + part2.length];
    System.arraycopy(part1, 0, expect, 0, part1.length);
    System.arraycopy(part2, 0, expect, part1.length, part2.length);
    fastAssertArrayEquals(expect, leaderIx.load(null, key));
    fastAssertArrayEquals(expect, replicaIx.load(null, key));
    replicaDb.close();
}

Example 9 with Database

use of org.cojen.tupl.Database in project Tupl by cojen.

the class DatabaseReplicatorTest method emergencyRecovery.

@Test
public void emergencyRecovery() throws Exception {
    // Test that database can be opened after the replication files are deleted. Anything
    // in them is lost.
    Database db = startGroup(1)[0];
    Index ix = db.openIndex("test");
    ix.store(null, "k1".getBytes(), "v1".getBytes());
    db.suspendCheckpoints();
    db.checkpoint();
    ix.store(null, "k2".getBytes(), "v2".getBytes());
    db.close();
    File baseFile = mReplBaseFiles[0];
    String prefix = baseFile.getName();
    baseFile.getParentFile().listFiles(file -> {
        String name = file.getName();
        if (name.startsWith(prefix) && !name.endsWith(".db")) {
            file.delete();
        }
        return false;
    });
    db = closeAndReopen(0);
    ix = db.openIndex("test");
    fastAssertArrayEquals("v1".getBytes(), ix.load(null, "k1".getBytes()));
    assertNull(ix.load(null, "k2".getBytes()));
    db.close();
}

Example 10 with Database

use of org.cojen.tupl.Database in project Tupl by cojen.

the class DatabaseReplicatorTest method explicitFailover.

@Test
public void explicitFailover() throws Exception {
    Database[] dbs = startGroup(2);
    Database leaderDb = dbs[0];
    Database replicaDb = dbs[1];
    Index leaderIx = leaderDb.openIndex("test");
    // Wait for replica to catch up.
    fence(leaderDb, replicaDb);
    Index replicaIx = replicaDb.openIndex("test");
    byte[] key = "hello".getBytes();
    byte[] value = "world".getBytes();
    leaderDb.failover();
    try {
        leaderIx.store(null, key, value);
        fail();
    } catch (UnmodifiableReplicaException e) {
    }
    boolean success = false;
    for (int i = 0; i < 10; i++) {
        try {
            replicaIx.store(null, key, value);
            success = true;
            break;
        } catch (UnmodifiableReplicaException e) {
        }
        TestUtils.sleep(1000);
    }
    assertTrue(success);
    // Wait for old leader to catch up.
    fence(replicaDb, leaderDb);
    fastAssertArrayEquals(value, leaderIx.load(null, key));
}