Java Code Examples for com.datastax.driver.core.Cluster#getMetadata()
The following examples show how to use
com.datastax.driver.core.Cluster#getMetadata() .
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Example 1
| Source File: ClusterFactory.java From arcusplatform with Apache License 2.0 | 6 votes |
|
protected Cluster createCluster() {
Cluster.Builder builder = Cluster.builder();
if (this.contactPoints != null && !this.contactPoints.isEmpty()) {
String[] values = new String[this.contactPoints.size()];
this.contactPoints.toArray(values);
builder.addContactPoints(values);
}
builder.withPort(this.port);
Cluster cluster = builder.build();
Metadata metadata = cluster.getMetadata();
LOG.info("Connected to Cassandra cluster: " + metadata.getClusterName());
for (Host host : metadata.getAllHosts()) {
LOG.info("DataCenter: {}, Rack: {}, Host: {}",
new Object[]{host.getDatacenter(), host.getRack(), host.getAddress()});
}
return cluster;
}
Example 2
| Source File: CassandraClusterProvider.java From conductor with Apache License 2.0 | 6 votes |
|
@Override
public Cluster get() {
String host = configuration.getHostAddress();
int port = configuration.getPort();
LOGGER.info("Connecting to cassandra cluster with host:{}, port:{}", host, port);
Cluster cluster = Cluster.builder()
.addContactPoint(host)
.withPort(port)
.build();
Metadata metadata = cluster.getMetadata();
LOGGER.info("Connected to cluster: {}", metadata.getClusterName());
metadata.getAllHosts().forEach(h -> {
LOGGER.info("Datacenter:{}, host:{}, rack: {}", h.getDatacenter(), h.getAddress(), h.getRack());
});
return cluster;
}
Example 3
| Source File: CassandraUtils.java From sstable-tools with Apache License 2.0 | 6 votes |
|
public static Cluster loadTablesFromRemote(String host, int port, String cfidOverrides) throws IOException {
Map<String, UUID> cfs = parseOverrides(cfidOverrides);
Cluster.Builder builder = Cluster.builder().addContactPoints(host).withPort(port);
Cluster cluster = builder.build();
Metadata metadata = cluster.getMetadata();
IPartitioner partitioner = FBUtilities.newPartitioner(metadata.getPartitioner());
if (DatabaseDescriptor.getPartitioner() == null)
DatabaseDescriptor.setPartitionerUnsafe(partitioner);
for (com.datastax.driver.core.KeyspaceMetadata ksm : metadata.getKeyspaces()) {
if (!ksm.getName().equals("system")) {
for (TableMetadata tm : ksm.getTables()) {
String name = ksm.getName()+"."+tm.getName();
try {
CassandraUtils.tableFromCQL(
new ByteArrayInputStream(tm.asCQLQuery().getBytes()),
cfs.get(name) != null ? cfs.get(name) : tm.getId());
} catch(SyntaxException e) {
// ignore tables that we cant parse (probably dse)
logger.debug("Ignoring table " + name + " due to syntax exception " + e.getMessage());
}
}
}
}
return cluster;
}
Example 4
| Source File: AbstractCassandraProcessor.java From localization_nifi with Apache License 2.0 | 4 votes |
|
protected void connectToCassandra(ProcessContext context) {
if (cluster.get() == null) {
ComponentLog log = getLogger();
final String contactPointList = context.getProperty(CONTACT_POINTS).getValue();
final String consistencyLevel = context.getProperty(CONSISTENCY_LEVEL).getValue();
List<InetSocketAddress> contactPoints = getContactPoints(contactPointList);
// Set up the client for secure (SSL/TLS communications) if configured to do so
final SSLContextService sslService =
context.getProperty(PROP_SSL_CONTEXT_SERVICE).asControllerService(SSLContextService.class);
final String rawClientAuth = context.getProperty(CLIENT_AUTH).getValue();
final SSLContext sslContext;
if (sslService != null) {
final SSLContextService.ClientAuth clientAuth;
if (StringUtils.isBlank(rawClientAuth)) {
clientAuth = SSLContextService.ClientAuth.REQUIRED;
} else {
try {
clientAuth = SSLContextService.ClientAuth.valueOf(rawClientAuth);
} catch (final IllegalArgumentException iae) {
throw new ProviderCreationException(String.format("Unrecognized client auth '%s'. Possible values are [%s]",
rawClientAuth, StringUtils.join(SslContextFactory.ClientAuth.values(), ", ")));
}
}
sslContext = sslService.createSSLContext(clientAuth);
} else {
sslContext = null;
}
final String username, password;
PropertyValue usernameProperty = context.getProperty(USERNAME);
PropertyValue passwordProperty = context.getProperty(PASSWORD);
if (usernameProperty != null && passwordProperty != null) {
username = usernameProperty.getValue();
password = passwordProperty.getValue();
} else {
username = null;
password = null;
}
// Create the cluster and connect to it
Cluster newCluster = createCluster(contactPoints, sslContext, username, password);
PropertyValue keyspaceProperty = context.getProperty(KEYSPACE);
final Session newSession;
if (keyspaceProperty != null) {
newSession = newCluster.connect(keyspaceProperty.getValue());
} else {
newSession = newCluster.connect();
}
newCluster.getConfiguration().getQueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf(consistencyLevel));
Metadata metadata = newCluster.getMetadata();
log.info("Connected to Cassandra cluster: {}", new Object[]{metadata.getClusterName()});
cluster.set(newCluster);
cassandraSession.set(newSession);
}
}
Example 5
| Source File: HintsPollerTest.java From emodb with Apache License 2.0 | 4 votes |
|
@Ignore
@Test
public void queryIsExecutedOnAllClusterNodesAndAlsoTheOldestHintIsPicked() {
// ***** TODO: Get a cluster with 2 nodes. (RUN WITH PERFTEST LATER.....) ******
// Ignoring this test for now
// Insert hints on all the cluster nodes.
Cluster cluster = Cluster.builder()
.addContactPoint("127.0.0.1")
.withPort(9164)
.withLoadBalancingPolicy(new SelectedHostLoadBalancingPolicyForTest())
.build();
Metadata metadata = cluster.getMetadata();
Session clusterSession = cluster.connect();
long hintTimestamp = System.currentTimeMillis();
for (Host host : metadata.getAllHosts()) {
SelectedHostStatement selectedHostStatement = new SelectedHostStatement(new SimpleStatement(getInsertHintsQuery(hintTimestamp)), host);
clusterSession.execute(selectedHostStatement);
hintTimestamp = hintTimestamp + 10000;
}
// Now check if the query ran on EVERY node of the cluster.
Assert.assertEquals(ALL_SELECTED_HOSTS.size(), 2);
// Get the oldest hint Timestamp of the cluster
ClusterHintsPoller clusterHintsPoller = new ClusterHintsPoller();
HintsPollerResult oldestHintsInfo = clusterHintsPoller.getOldestHintsInfo(clusterSession);
// Note: ?? - This will make the test fail even if one node is down or a connection problem with just one node.
Assert.assertNotNull(oldestHintsInfo);
Assert.assertEquals(oldestHintsInfo.getAllPolledHosts().size(), 2);
long retrievedHintTimeStamp = oldestHintsInfo.getOldestHintTimestamp().or(Long.MAX_VALUE);
Assert.assertEquals(retrievedHintTimeStamp, hintTimestamp);
cluster.close();
clusterSession.close();
}
Example 6
| Source File: AbstractCassandraProcessor.java From nifi with Apache License 2.0 | 4 votes |
|
void connectToCassandra(ProcessContext context) {
if (cluster.get() == null) {
ComponentLog log = getLogger();
final String contactPointList = context.getProperty(CONTACT_POINTS).evaluateAttributeExpressions().getValue();
final String consistencyLevel = context.getProperty(CONSISTENCY_LEVEL).getValue();
final String compressionType = context.getProperty(COMPRESSION_TYPE).getValue();
List<InetSocketAddress> contactPoints = getContactPoints(contactPointList);
// Set up the client for secure (SSL/TLS communications) if configured to do so
final SSLContextService sslService = context.getProperty(PROP_SSL_CONTEXT_SERVICE).asControllerService(SSLContextService.class);
final String rawClientAuth = context.getProperty(CLIENT_AUTH).getValue();
final SSLContext sslContext;
if (sslService != null) {
final SslContextFactory.ClientAuth clientAuth;
if (StringUtils.isBlank(rawClientAuth)) {
clientAuth = SslContextFactory.ClientAuth.REQUIRED;
} else {
try {
clientAuth = SslContextFactory.ClientAuth.valueOf(rawClientAuth);
} catch (final IllegalArgumentException iae) {
throw new IllegalStateException(String.format("Unrecognized client auth '%s'. Possible values are [%s]",
rawClientAuth, StringUtils.join(SslContextFactory.ClientAuth.values(), ", ")));
}
}
sslContext = sslService.createSSLContext(clientAuth);
} else {
sslContext = null;
}
final String username, password;
PropertyValue usernameProperty = context.getProperty(USERNAME).evaluateAttributeExpressions();
PropertyValue passwordProperty = context.getProperty(PASSWORD).evaluateAttributeExpressions();
if (usernameProperty != null && passwordProperty != null) {
username = usernameProperty.getValue();
password = passwordProperty.getValue();
} else {
username = null;
password = null;
}
// Create the cluster and connect to it
Cluster newCluster = createCluster(contactPoints, sslContext, username, password, compressionType);
PropertyValue keyspaceProperty = context.getProperty(KEYSPACE).evaluateAttributeExpressions();
final Session newSession;
// For Java 11, the getValue() call was added so the test could pass
if (keyspaceProperty != null && keyspaceProperty.getValue() != null) {
newSession = newCluster.connect(keyspaceProperty.getValue());
} else {
newSession = newCluster.connect();
}
newCluster.getConfiguration().getQueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf(consistencyLevel));
Metadata metadata = newCluster.getMetadata();
log.info("Connected to Cassandra cluster: {}", new Object[]{metadata.getClusterName()});
cluster.set(newCluster);
cassandraSession.set(newSession);
}
}
Example 7
| Source File: CassandraSessionProvider.java From nifi with Apache License 2.0 | 4 votes |
|
private void connectToCassandra(ConfigurationContext context) {
if (cluster == null) {
ComponentLog log = getLogger();
final String contactPointList = context.getProperty(CONTACT_POINTS).evaluateAttributeExpressions().getValue();
final String consistencyLevel = context.getProperty(CONSISTENCY_LEVEL).getValue();
final String compressionType = context.getProperty(COMPRESSION_TYPE).getValue();
List<InetSocketAddress> contactPoints = getContactPoints(contactPointList);
// Set up the client for secure (SSL/TLS communications) if configured to do so
final SSLContextService sslService =
context.getProperty(PROP_SSL_CONTEXT_SERVICE).asControllerService(SSLContextService.class);
final String rawClientAuth = context.getProperty(CLIENT_AUTH).getValue();
final SSLContext sslContext;
if (sslService != null) {
final SslContextFactory.ClientAuth clientAuth;
if (StringUtils.isBlank(rawClientAuth)) {
clientAuth = SslContextFactory.ClientAuth.REQUIRED;
} else {
try {
clientAuth = SslContextFactory.ClientAuth.valueOf(rawClientAuth);
} catch (final IllegalArgumentException iae) {
throw new ProviderCreationException(String.format("Unrecognized client auth '%s'. Possible values are [%s]",
rawClientAuth, StringUtils.join(SslContextFactory.ClientAuth.values(), ", ")));
}
}
sslContext = sslService.createSSLContext(clientAuth);
} else {
sslContext = null;
}
final String username, password;
PropertyValue usernameProperty = context.getProperty(USERNAME).evaluateAttributeExpressions();
PropertyValue passwordProperty = context.getProperty(PASSWORD).evaluateAttributeExpressions();
if (usernameProperty != null && passwordProperty != null) {
username = usernameProperty.getValue();
password = passwordProperty.getValue();
} else {
username = null;
password = null;
}
PropertyValue readTimeoutMillisProperty = context.getProperty(READ_TIMEOUT_MS).evaluateAttributeExpressions();
Optional<Integer> readTimeoutMillisOptional = Optional.ofNullable(readTimeoutMillisProperty)
.filter(PropertyValue::isSet)
.map(PropertyValue::asInteger);
PropertyValue connectTimeoutMillisProperty = context.getProperty(CONNECT_TIMEOUT_MS).evaluateAttributeExpressions();
Optional<Integer> connectTimeoutMillisOptional = Optional.ofNullable(connectTimeoutMillisProperty)
.filter(PropertyValue::isSet)
.map(PropertyValue::asInteger);
// Create the cluster and connect to it
Cluster newCluster = createCluster(contactPoints, sslContext, username, password, compressionType, readTimeoutMillisOptional, connectTimeoutMillisOptional);
PropertyValue keyspaceProperty = context.getProperty(KEYSPACE).evaluateAttributeExpressions();
final Session newSession;
if (keyspaceProperty != null) {
newSession = newCluster.connect(keyspaceProperty.getValue());
} else {
newSession = newCluster.connect();
}
newCluster.getConfiguration().getQueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf(consistencyLevel));
Metadata metadata = newCluster.getMetadata();
log.info("Connected to Cassandra cluster: {}", new Object[]{metadata.getClusterName()});
cluster = newCluster;
cassandraSession = newSession;
}
}
