Examples of org.hsqldb.Server

org.hsqldb.Server
port][/<alias>]'.
The value of database.0 is special. If dbname.0 is not specified, then this defaults to an empty string and a connection is made to database.0 path when the <alias> component of an HSQLDB HSQL protocol database connection url is omitted. If a database key/value pair is found in the properties when the main method is called, this pair is supersedes the database.0 setting
This behaviour allows the previous database connection url format to work with essentially unchanged semantics.
When the remote_open property is true, a connection attempt to an unopened database results in the database being opened. The URL for connection should include the property filepath to specify the path. 'jdbc:hsqldb:hsql[s]://host[port]/<alias>;filepath=hsqldb:file:<database path>'. the given alias and filepath value will be associated together. The database user and password to start this connection must be valid. If this form of connection is used again, after the database has been opened, the filepath property is ignored.
Once an alias such as "mydb" has been associated with a path, it cannot be reassigned to a different path.
If a database is closed with the SHUTDOWN command, its alias is removed. It is then possible to connect to this database again with a different (or the same) alias.
If the same database is connected to via two different aliases, and then one of the is closed with the SHUTDOWN command, the other is also closed.

From the 'server.properties' file, options can be set similarly, using a slightly different format.

Here is an example 'server.properties' file:

 server.port=9001 server.database.0=test server.dbname.0=... ... server.database.n=... server.dbname.n=... server.silent=true

Starting with 1.7.2, Server has been refactored to become a simple JavaBean with non-blocking start() and stop() service methods. It is possible to configure a Server instance through the JavaBean API as well, but this part of the public interface is still under review and will not be finalized or documented fully until the final 1.7.2 release.

Note:

The 'no_system_exit' property is of particular interest.

If a Server instance is to run embedded in, say, an application server, such as when the jdbcDataSource or HsqlServerFactory classes are used, it is typically necessary to avoid calling System.exit() when the Server instance shuts down.

By default, 'no_system_exit' is set:

true when a Server is started directly from the start() method.
false when a Server is started from the main(String[]) method.

These values are natural to their context because the first case allows the JVM to exit by default on Server shutdown when a Server instance is started from a command line environment, whereas the second case prevents a typically unwanted JVM exit on Server shutdown when a Server intance is started as part of a larger framework.

Replaces original Hypersonic source of the same name. @author fredt@users @version 1.8.0 @since 1.7.2 @jmx.mbean description="HSQLDB Server" extends="org.hsqldb.mx.mbean.RegistrationSupportBaseMBean" @jboss.xmbean

        super(name);
    }


    protected void setUp() {


        server = new Server();


        server.putPropertiesFromString(serverProps);
        server.setLogWriter(null);
        server.setErrWriter(null);
        server.start();

    } catch (RuntimeException re) {
      LOG.info("Server is already started.");
      return;
    }


    server = new Server();
    server.setDatabasePath(0, "file:" + fileLocation);
    server.setDatabaseName(0, "sqoop");
    server.putPropertiesFromString("hsqldb.write_delay=false");
    server.setPort(port);
    server.setSilent(true);

    if (null == server) {
      LOG.info("Starting new hsqldb server; database=" + DATABASE_NAME);
      String tmpDir = System.getProperty("test.build.data", "/tmp/");
      String dbLocation = tmpDir + "/sqoop/testdb.file";
      if (inMemoryDB) {dbLocation = IN_MEM; }
      server = new Server();


      server.setDatabaseName(0, DATABASE_NAME);
      server.putPropertiesFromString("database.0=" + dbLocation
          + ";no_system_exit=true");
      server.start();


  private boolean startHsqldb = true;


  private void startHsqldbServer() {
    log.info("Starting HSQLDB server");
    server = new Server();
    server.setDatabasePath(0,
        System.getProperty("test.build.data", "/tmp") + "/goratest");
    server.setDatabaseName(0, "goratest");
    server.setDaemon(true);
    server.setPort(Integer.parseInt(HSQLDB_PORT));

    OUT_DIR = System.getProperty("test.build.data", "/tmp") + "/dddbifout";
  }


  private void startHsqldbServer() {
    if (null == server) {
      server = new Server();
      server.setDatabasePath(0,
          System.getProperty("test.build.data", "/tmp") + "/" + DB_NAME);
      server.setDatabaseName(0, DB_NAME);
      server.start();
    }

  private static final String DRIVER_CLASS = "org.hsqldb.jdbcDriver";
  
  private Server server;
  
  private void startHsqldbServer() {
    server = new Server();
    server.setDatabasePath(0, 
        System.getProperty("test.build.data",".") + "/URLAccess");
    server.setDatabaseName(0, "URLAccess");
    server.start();
  }

   */
  public void testMultiProcess() throws Exception {
    // create and start a hsql server, a stand-alone (memory backed) db
    // (important: a stand-alone server should be used because simple
    //  file based access i.e. jdbc:hsqldb:file is NOT process-safe.)
    Server server = new Server();
    server.setDaemon(true);
    server.setSilent(true); // disables LOTS of trace
    final String className = getClass().getName();
    String dbName = "test";
    server.setDatabasePath(0, "mem:"+dbName);
    server.setDatabaseName(0, dbName);
    server.start();
    
    //create the store so that the tests can start right away
    StorageUtils.createWebStore(conf, String.class, WebPage.class);
    
    // create a fixed thread pool
    int numThreads = 4;
    ExecutorService pool = Executors.newFixedThreadPool(numThreads);
    
    // spawn multiple processes, each thread spawns own process
    Collection<Callable<Integer>> tasks = new ArrayList<Callable<Integer>>();
    for (int i = 0; i < numThreads; i++) {
      tasks.add(new Callable<Integer>() {
        @Override
        public Integer call() {
          try {
            String separator = System.getProperty("file.separator");
            String classpath = System.getProperty("java.class.path");
            String pathSeparator = System.getProperty("path.separator");
            // connect local sql service
            classpath = "./src/testprocess" + pathSeparator + classpath;
            String path = System.getProperty("java.home") + separator + "bin"
                + separator + "java";
            ProcessBuilder processBuilder = new ProcessBuilder(path, "-cp", 
                classpath, className);
            processBuilder.redirectErrorStream(true);
            Process process = processBuilder.start();
            InputStream in = process.getInputStream();
            int exit = process.waitFor();
            //print the output of the process
            System.out.println("===Process stream for " + Thread.currentThread() 
                + "\n" + IOUtils.toString(in) + "===End of process stream.");
            in.close();
            // process should exit with zero code
            return exit;
          } catch (Exception e) {
            e.printStackTrace();
            // this will fail the test
            return 1;
          }
        }
      });
    }


    // submit them at once
    List<Future<Integer>> results = pool.invokeAll(tasks);


    // check results
    for (Future<Integer> result : results) {
      assertEquals(0, (int) result.get());
    }
    
    //stop db
    server.stop();
  }

            } catch (NameNotFoundException e) {
                //Ignore
            }


            // create the server
            server = new Server();
            // add the silent property
            properties.setProperty(sc_key_silent, "true");
            // set the log and error writers
            server.setLogWriter(new HsqlPrintWriter(false));
            server.setErrWriter(new HsqlPrintWriter(true));

        .setProperty("mapred.map.max.attempts", "1");
    pigServer.getPigContext().getProperties()
        .setProperty("mapred.reduce.max.attempts", "1");
    System.out.println("Pig server initialized successfully");
    // Initialise DBServer
    dbServer = new Server();
    dbServer.setDatabaseName(0, "batchtest");
    // dbServer.setDatabasePath(0, "mem:test;sql.enforce_strict_size=true");
    dbServer.setDatabasePath(0,
        "file:/tmp/batchtest;sql.enforce_strict_size=true");
    dbServer.setLogWriter(null);

            } catch (NameNotFoundException e) {
                //Ignore
            }


            // create the server
            server = new Server();
            // add the silent property
            properties.setProperty(sc_key_silent, "true");
            // set the log and error writers
            server.setLogWriter(new HsqlPrintWriter(false));
            server.setErrWriter(new HsqlPrintWriter(true));

Examples of org.hsqldb.Server

Related Classes of org.hsqldb.Server