¿Es posible iniciar una instancia del servidor zookeeper en proceso, por ejemplo, para pruebas unitarias?
Llamando a org.apache.cuidador del zoológico.servidor.quórum.QuorumPeerMain.main() no funciona.
6 answers
Para iniciar ZooKeeper
tienes que ejecutar la clase ZooKeeperServerMain
.
Puede usar el siguiente código para iniciar ZooKeeper
en modo incrustado.
Properties startupProperties = ...
QuorumPeerConfig quorumConfiguration = new QuorumPeerConfig();
try {
quorumConfiguration.parseProperties(startupProperties);
} catch(Exception e) {
throw new RuntimeException(e);
}
zooKeeperServer = new ZooKeeperServerMain();
final ServerConfig configuration = new ServerConfig();
configuration.readFrom(quorumConfiguration);
new Thread() {
public void run() {
try {
zooKeeperServer.runFromConfig(configuration);
} catch (IOException e) {
log.error("ZooKeeper Failed", e);
}
}
}.start();
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2012-02-15 13:36:57
Netfix opensourced Curator un framework para hacer el uso de Zookeeper aún más conveniente. Tiene una clase de servidor de prueba incorporada. Si usas Maven simplemente agrega esto a la pom.xml
de tu proyecto:
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-test</artifactId>
<version>2.2.0-incubating</version>
<scope>test</scope>
</dependency>
Y aquí están los elementos esenciales de la prueba.
TestingServer zkTestServer;
@Before
public void startZookeeper() throws Exception {
zkTestServer = new TestingServer(2181);
cli = CuratorFrameworkFactory.newClient(zkTestServer.getConnectString(), new RetryOneTime(2000));
}
@After
public void stopZookeeper() throws IOException {
cli.close();
zkTestServer.stop();
}
Con cli
crear cualquier dato de prueba es muy fácil.
cli.create().forPath("/a1", "testvalue".getBytes());
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2013-10-22 07:02:44
Puedes usar algo como esto.
int clientPort = 21818; // none-standard
int numConnections = 5000;
int tickTime = 2000;
String dataDirectory = System.getProperty("java.io.tmpdir");
File dir = new File(dataDirectory, "zookeeper").getAbsoluteFile();
ZooKeeperServer server = new ZooKeeperServer(dir, dir, tickTime);
NIOServerCnxn.Factory standaloneServerFactory = new NIOServerCnxn.Factory(new InetSocketAddress(clientPort), numConnections);
standaloneServerFactory.startup(server); // start the server.
Y para apagarlo solo llama standaloneServerFactory.shutdown()
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2012-02-15 00:36:16
Construyendo sobre 1's responder añadiendo el uso de un puerto efímero (mostrado por zkPort
) y actualizado para la última API ZK:
int tickTime = 2000;
int numConnections = 5000;
String dataDirectory = System.getProperty("java.io.tmpdir");
File dir = new File(dataDirectory, "zookeeper").getAbsoluteFile();
ZooKeeperServer server = new ZooKeeperServer(dir, dir, tickTime);
standaloneServerFactory = ServerCnxnFactory.createFactory(0, numConnections);
int zkPort = standaloneServerFactory.getLocalPort();
standaloneServerFactory.startup(server);
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2017-05-23 10:31:12
ServerConfig config = new ServerConfig();
config.parse(new String[] {port, dir});
ZooKeeperServerMain zk = new ZooKeeperServerMain();
zk.runFromConfig(config);
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2013-04-09 13:18:08
Una versión actualizada de la respuesta de GeoffBourne.
int clientPort = 2199; // not standard
int numConnections = 5000;
int tickTime = 2000;
String dataDirectory = System.getProperty("java.io.tmpdir");
File dir = new File(dataDirectory, "zookeeper").getAbsoluteFile();
ZooKeeperServer server = new ZooKeeperServer(dir, dir, tickTime);
ServerCnxnFactory factory = new NIOServerCnxnFactory();
factory.configure(new InetSocketAddress(clientPort), numConnections);
factory.startup(server); // start the server.
// ...shutdown some time later
factory.shutdown();
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2016-09-15 15:09:16