本文整理汇总了Java中com.netflix.astyanax.connectionpool.impl.ConnectionPoolType类的典型用法代码示例。如果您正苦于以下问题：Java ConnectionPoolType类的具体用法？Java ConnectionPoolType怎么用？Java ConnectionPoolType使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
ConnectionPoolType类属于com.netflix.astyanax.connectionpool.impl包，在下文中一共展示了ConnectionPoolType类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: setupAstyanaxContext
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private Keyspace setupAstyanaxContext(String clusterName)
{
AstyanaxContext<Keyspace> context = new AstyanaxContext.Builder()
.forCluster(clusterName)
.forKeyspace("CrawlerKS")
.withAstyanaxConfiguration(new AstyanaxConfigurationImpl()
.setDiscoveryType(NodeDiscoveryType.NONE)
.setConnectionPoolType(ConnectionPoolType.TOKEN_AWARE)
)
.withConnectionPoolConfiguration(new ConnectionPoolConfigurationImpl("CassandraPool")
.setPort(9160)
.setMaxConnsPerHost(3)
.setSeeds("127.0.0.1:9160")
)
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance());
context.start();
return context.getClient();
}
示例2: initWithThriftDriverWithExternalHostsSupplier
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private AstyanaxContext<Keyspace> initWithThriftDriverWithExternalHostsSupplier() {
logger.info("Boot cluster (BOOT_CLUSTER) is {}, keyspace name (KS_NAME) is {}", BOOT_CLUSTER, KS_NAME);
return new AstyanaxContext.Builder()
.forCluster(BOOT_CLUSTER)
.forKeyspace(KS_NAME)
.withAstyanaxConfiguration(
new AstyanaxConfigurationImpl()
.setDiscoveryType(
NodeDiscoveryType.DISCOVERY_SERVICE)
.setConnectionPoolType(
ConnectionPoolType.ROUND_ROBIN))
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl(
"MyConnectionPool")
.setMaxConnsPerHost(3)
.setPort(thriftPortForAstyanax))
.withHostSupplier(getSupplier())
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance());
}
示例3: beforeClass
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
@BeforeClass
public static void beforeClass() {
astyanaxContext =
new AstyanaxContext.Builder()
.forKeyspace("timeSeriesKeyspace")
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl("myCPConfig")
.setSeeds("localhost")
.setPort(9171))
.withAstyanaxConfiguration(
new AstyanaxConfigurationImpl()
.setConnectionPoolType(ConnectionPoolType.TOKEN_AWARE)
.setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE))
.buildKeyspace(ThriftFamilyFactory.getInstance());
keyspace = astyanaxContext.getClient();
astyanaxContext.start();
}
示例4: testCassandraContext
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
public static AstyanaxContext<Keyspace> testCassandraContext() {
return new AstyanaxContext.Builder()
.forCluster(CLUSTER_NAME)
.forKeyspace(KEYSPACE_NAME)
.withAstyanaxConfiguration(new AstyanaxConfigurationImpl()
.setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE)
.setConnectionPoolType(ConnectionPoolType.ROUND_ROBIN)
.setAsyncExecutor(Executors.newFixedThreadPool(
CLIENT_THREADS,
new ThreadFactoryBuilder().setDaemon(true)
.setNameFormat("astyanax-%d")
.build()
))
)
.withConnectionPoolConfiguration(new ConnectionPoolConfigurationImpl("Atlas")
.setPort(PORT)
.setMaxBlockedThreadsPerHost(CLIENT_THREADS)
.setMaxConnsPerHost(CLIENT_THREADS)
.setMaxConns(CLIENT_THREADS * 5)
.setConnectTimeout(CONNECTION_TIMEOUT)
.setSeeds(SEEDS)
)
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance());
}
示例5: astyanaxConfiguration
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
@Bean
@ConditionalOnMissingBean(AstyanaxConfiguration.class)
@ConfigurationProperties("cassandra")
public AstyanaxConfiguration astyanaxConfiguration(@Qualifier("cassandraAsyncExecutor") ExecutorService cassandraAsyncExecutor) {
return new AstyanaxConfigurationImpl()
.setDefaultReadConsistencyLevel(ConsistencyLevel.CL_LOCAL_QUORUM)
.setDefaultWriteConsistencyLevel(ConsistencyLevel.CL_LOCAL_QUORUM)
.setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE)
.setConnectionPoolType(ConnectionPoolType.TOKEN_AWARE)
.setCqlVersion("3.0.0")
.setTargetCassandraVersion("2.0")
.setAsyncExecutor(cassandraAsyncExecutor);
}
示例6: provideKeyspace
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
@Provides
@Named("astmetaks")
@Singleton
Keyspace provideKeyspace() {
AstyanaxContext<Keyspace> keyspaceContext = new AstyanaxContext.Builder()
.forCluster("test cluster")
.forKeyspace(MetaConstants.META_KEY_SPACE)
.withAstyanaxConfiguration(
new AstyanaxConfigurationImpl()
.setDiscoveryType(
NodeDiscoveryType.NONE)
.setConnectionPoolType(
ConnectionPoolType.ROUND_ROBIN)
.setTargetCassandraVersion("1.2")
.setCqlVersion("3.0.0"))
// .withHostSupplier(hs.getSupplier(clustername))
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl("localpool"
+ "_" + MetaConstants.META_KEY_SPACE)
.setSocketTimeout(30000)
.setMaxTimeoutWhenExhausted(20000)
.setMaxConnsPerHost(3).setInitConnsPerHost(1)
.setSeeds("localhost"+":"+"9160")) //uncomment for localhost
// .withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance());
keyspaceContext.start();
Keyspace keyspace;
keyspace = keyspaceContext.getClient();
return keyspace;
}
示例7: provideKeyspace
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
@Provides
@Named("astmetaks")
Keyspace provideKeyspace(@Named("staash.metacluster") String clustername,EurekaAstyanaxHostSupplier hs) {
String clusterNameOnly = "";
String[] clusterinfo = clustername.split(":");
if (clusterinfo != null && clusterinfo.length == 2) {
clusterNameOnly = clusterinfo[0];
} else {
clusterNameOnly = clustername;
}
AstyanaxContext<Keyspace> keyspaceContext = new AstyanaxContext.Builder()
.forCluster(clusterNameOnly)
.forKeyspace(MetaConstants.META_KEY_SPACE)
.withAstyanaxConfiguration(
new AstyanaxConfigurationImpl()
.setDiscoveryType(
NodeDiscoveryType.RING_DESCRIBE)
.setConnectionPoolType(
ConnectionPoolType.TOKEN_AWARE)
.setDiscoveryDelayInSeconds(60)
.setTargetCassandraVersion("1.2")
.setCqlVersion("3.0.0"))
.withHostSupplier(hs.getSupplier(clustername))
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl(clusterNameOnly
+ "_" + MetaConstants.META_KEY_SPACE)
.setSocketTimeout(11000)
.setConnectTimeout(2000)
.setMaxConnsPerHost(10).setInitConnsPerHost(3))
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance());
keyspaceContext.start();
Keyspace keyspace;
keyspace = keyspaceContext.getClient();
return keyspace;
}
示例8: registerKeyspace
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
/**
* Register a keyspace such that a client is created for it and it is now accessible to
* this instance
*
* @param keyspaceName
* @throws AlreadyExistsException
*/
public synchronized void registerKeyspace(String keyspaceName) throws AlreadyExistsException {
Preconditions.checkNotNull(keyspaceName);
if (keyspaces.containsKey(keyspaceName)) {
throw new AlreadyExistsException("keyspace", keyspaceName);
}
CassandraKeyspaceHolder keyspace = new CassandraKeyspaceHolder(new AstyanaxContext.Builder()
.forCluster(clusterName)
.forKeyspace(keyspaceName)
.withAstyanaxConfiguration(
new AstyanaxConfigurationImpl()
.setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE)
.setConnectionPoolType(ConnectionPoolType.ROUND_ROBIN)
.setDiscoveryDelayInSeconds(60000))
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl(
clusterName + "_" + keyspaceName)
.setSeeds("localhost:9160"))
.withConnectionPoolMonitor(new Slf4jConnectionPoolMonitorImpl())
.buildKeyspace(ThriftFamilyFactory.getInstance()));
try {
keyspace.initialize();
}
finally {
keyspaces.put(keyspaceName, keyspace);
}
}
示例9: get
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
@Override
public AstyanaxConfiguration get(String name) {
return new AstyanaxConfigurationImpl()
.setDiscoveryType(NodeDiscoveryType.NONE)
.setConnectionPoolType(ConnectionPoolType.ROUND_ROBIN)
.setDiscoveryDelayInSeconds(60000)
.setCqlVersion("3.0.0");
}
示例10: createPreferredAstyanaxConfiguration
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private static AstyanaxConfigurationImpl createPreferredAstyanaxConfiguration() {
AstyanaxConfigurationImpl astyconfig = new AstyanaxConfigurationImpl()
.setDiscoveryType(NodeDiscoveryType.NONE)
.setConnectionPoolType(ConnectionPoolType.ROUND_ROBIN);
int numRetries = config.getIntegerProperty(CoreConfig.CASSANDRA_MAX_RETRIES);
if (numRetries > 0) {
astyconfig.setRetryPolicy(new RetryNTimes(numRetries));
}
return astyconfig;
}
示例11: CassandraService
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
public CassandraService()
{
System.out.println("Firing up connection to Cassandra...");
context = (new com.netflix.astyanax.AstyanaxContext.Builder()).forCluster("Test Cluster").forKeyspace("OwenTest").withAstyanaxConfiguration((new AstyanaxConfigurationImpl()).setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE).setConnectionPoolType(ConnectionPoolType.TOKEN_AWARE)).withConnectionPoolConfiguration((new ConnectionPoolConfigurationImpl("MyConnectionPool")).setPort(9160).setMaxConnsPerHost(3).setSeeds("10.10.1.2:9160")).withConnectionPoolMonitor(new CountingConnectionPoolMonitor()).buildKeyspace(ThriftFamilyFactory.getInstance());
context.start();
keyspace = (Keyspace)context.getEntity();
}
示例12: newAstyanaxBuilder
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private AstyanaxContext.Builder newAstyanaxBuilder(String name, ConnectionPoolConfiguration poolConfig,
MetricRegistry metricRegistry) {
performHostDiscovery(metricRegistry);
LatencyScoreStrategy latencyScoreStrategy = _latencyAware ?
new EmaLatencyScoreStrategyImpl(_latencyAwareWindowSize) :
new EmptyLatencyScoreStrategyImpl();
ConnectionPoolConfigurationImpl poolConfiguration = new ConnectionPoolConfigurationImpl(name)
.setLocalDatacenter(_dataCenter)
.setSeeds(_seeds)
.setPartitioner(_partitioner.newAstyanaxPartitioner())
.setInitConnsPerHost(poolConfig.getInitialConnectionsPerHost().or(getInitialConnectionsPerHost()).or(ConnectionPoolConfigurationImpl.DEFAULT_INIT_PER_PARTITION))
.setMaxConnsPerHost(poolConfig.getMaxConnectionsPerHost().or(getMaxConnectionsPerHost()).or(ConnectionPoolConfigurationImpl.DEFAULT_MAX_ACTIVE_PER_PARTITION))
.setPort(_thriftPort)
.setSocketTimeout(poolConfig.getSocketTimeout().or(getSocketTimeout()).or(ConnectionPoolConfigurationImpl.DEFAULT_SOCKET_TIMEOUT))
.setConnectTimeout(poolConfig.getConnectTimeout().or(getConnectTimeout()).or(ConnectionPoolConfigurationImpl.DEFAULT_CONNECT_TIMEOUT))
.setMaxFailoverCount(poolConfig.getMaxFailoverCount().or(getMaxFailoverCount()).or(ConnectionPoolConfigurationImpl.DEFAULT_FAILOVER_COUNT))
.setConnectionLimiterWindowSize(poolConfig.getConnectionLimiterWindowSize().or(getConnectionLimiterWindowSize()).or(ConnectionPoolConfigurationImpl.DEFAULT_CONNECTION_LIMITER_WINDOW_SIZE))
.setConnectionLimiterMaxPendingCount(poolConfig.getConnectionLimiterMaxPendingCount().or(getConnectionLimiterMaxPendingCount()).or(ConnectionPoolConfigurationImpl.DEFAULT_CONNECTION_LIMITER_MAX_PENDING_COUNT))
.setMaxPendingConnectionsPerHost(poolConfig.getMaxPendingConnectionsPerHost().or(getMaxPendingConnectionsPerHost()).or(ConnectionPoolConfigurationImpl.DEFAULT_MAX_PENDING_CONNECTIONS_PER_HOST))
.setMaxBlockedThreadsPerHost(poolConfig.getMaxBlockedThreadsPerHost().or(getMaxBlockedThreadsPerHost()).or(ConnectionPoolConfigurationImpl.DEFAULT_MAX_BLOCKED_THREADS_PER_HOST))
.setMaxTimeoutCount(poolConfig.getMaxTimeoutCount().or(getMaxTimeoutCount()).or(ConnectionPoolConfigurationImpl.DEFAULT_MAX_TIMEOUT_COUNT))
.setTimeoutWindow(poolConfig.getTimeoutWindow().or(getTimeoutWindow()).or(ConnectionPoolConfigurationImpl.DEFAULT_TIMEOUT_WINDOW))
.setRetrySuspendWindow(poolConfig.getRetrySuspendWindow().or(getRetrySuspendWindow()).or(ConnectionPoolConfigurationImpl.DEFAULT_RETRY_SUSPEND_WINDOW))
.setRetryDelaySlice(poolConfig.getRetryDelaySlice().or(getRetryDelaySlice()).or(ConnectionPoolConfigurationImpl.DEFAULT_RETRY_DELAY_SLICE))
.setRetryMaxDelaySlice(poolConfig.getRetryMaxDelaySlice().or(getRetryMaxDelaySlice()).or(ConnectionPoolConfigurationImpl.DEFAULT_RETRY_MAX_DELAY_SLICE))
.setMaxTimeoutWhenExhausted(poolConfig.getMaxTimeoutWhenExhausted().or(getMaxTimeoutWhenExhausted()).or(ConnectionPoolConfigurationImpl.DEFAULT_MAX_TIME_WHEN_EXHAUSTED))
.setAuthenticationCredentials(_authenticationCredentials)
.setLatencyScoreStrategy(latencyScoreStrategy);
CountingConnectionPoolMonitor poolMonitor = _verboseHostLogging ?
new Slf4jConnectionPoolMonitorImpl() :
new CountingConnectionPoolMonitor();
AstyanaxConfigurationImpl asConfig = new AstyanaxConfigurationImpl()
.setConnectionPoolType(ConnectionPoolType.TOKEN_AWARE)
.setDiscoveryType(NodeDiscoveryType.TOKEN_AWARE)
.setTargetCassandraVersion("1.2");
if (_maxThriftFrameSize.isPresent()) {
asConfig.setMaxThriftSize((int) _maxThriftFrameSize.get().toBytes());
}
return new AstyanaxContext.Builder()
.withAstyanaxConfiguration(asConfig)
.withConnectionPoolConfiguration(poolConfiguration)
.withConnectionPoolMonitor(poolMonitor);
}
示例13: getContextBuilder
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private AstyanaxContext.Builder getContextBuilder(Configuration config, int maxConnsPerHost, String usedFor) {
final ConnectionPoolType poolType = ConnectionPoolType.valueOf(config.get(CONNECTION_POOL_TYPE));
final NodeDiscoveryType discType = NodeDiscoveryType.valueOf(config.get(NODE_DISCOVERY_TYPE));
final int maxConnections = config.get(MAX_CONNECTIONS);
final int maxOperationsPerConnection = config.get(MAX_OPERATIONS_PER_CONNECTION);
final int connectionTimeout = (int) connectionTimeoutMS.toMillis();
ConnectionPoolConfigurationImpl cpool =
new ConnectionPoolConfigurationImpl(usedFor + "TitanConnectionPool")
.setPort(port)
.setMaxOperationsPerConnection(maxOperationsPerConnection)
.setMaxConnsPerHost(maxConnsPerHost)
.setRetryDelaySlice(retryDelaySlice)
.setRetryMaxDelaySlice(retryMaxDelaySlice)
.setRetrySuspendWindow(retrySuspendWindow)
.setSocketTimeout(connectionTimeout)
.setConnectTimeout(connectionTimeout)
.setSeeds(StringUtils.join(hostnames, ","));
if (null != retryBackoffStrategy) {
cpool.setRetryBackoffStrategy(retryBackoffStrategy);
log.debug("Custom RetryBackoffStrategy {}", cpool.getRetryBackoffStrategy());
} else {
log.debug("Default RetryBackoffStrategy {}", cpool.getRetryBackoffStrategy());
}
if (StringUtils.isNotBlank(localDatacenter)) {
cpool.setLocalDatacenter(localDatacenter);
log.debug("Set local datacenter: {}", cpool.getLocalDatacenter());
}
AstyanaxConfigurationImpl aconf =
new AstyanaxConfigurationImpl()
.setConnectionPoolType(poolType)
.setDiscoveryType(discType)
.setTargetCassandraVersion("1.2")
.setMaxThriftSize(thriftFrameSizeBytes);
if (0 < maxConnections) {
cpool.setMaxConns(maxConnections);
}
if (hasAuthentication()) {
cpool.setAuthenticationCredentials(new SimpleAuthenticationCredentials(username, password));
}
if (config.get(SSL_ENABLED)) {
cpool.setSSLConnectionContext(new SSLConnectionContext(config.get(SSL_TRUSTSTORE_LOCATION), config.get(SSL_TRUSTSTORE_PASSWORD)));
}
AstyanaxContext.Builder ctxBuilder = new AstyanaxContext.Builder();
// Standard context builder options
ctxBuilder
.forCluster(clusterName)
.forKeyspace(keySpaceName)
.withAstyanaxConfiguration(aconf)
.withConnectionPoolConfiguration(cpool)
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor());
// Conditional context builder option: host supplier
if (config.has(HOST_SUPPLIER)) {
String hostSupplier = config.get(HOST_SUPPLIER);
Supplier<List<Host>> supplier = null;
if (hostSupplier != null) {
try {
supplier = (Supplier<List<Host>>) Class.forName(hostSupplier).newInstance();
ctxBuilder.withHostSupplier(supplier);
} catch (Exception e) {
log.warn("Problem with host supplier class " + hostSupplier + ", going to use default.", e);
}
}
}
return ctxBuilder;
}
示例14: getContextBuilder
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private AstyanaxContext.Builder getContextBuilder(Configuration config, int maxConnsPerHost, String usedFor) {
final ConnectionPoolType poolType = ConnectionPoolType.valueOf(config.get(CONNECTION_POOL_TYPE));
final NodeDiscoveryType discType = NodeDiscoveryType.valueOf(config.get(NODE_DISCOVERY_TYPE));
final int maxConnections = config.get(MAX_CONNECTIONS);
final int maxOperationsPerConnection = config.get(MAX_OPERATIONS_PER_CONNECTION);
final int connectionTimeout = (int) connectionTimeoutMS.getLength(TimeUnit.MILLISECONDS);
ConnectionPoolConfigurationImpl cpool =
new ConnectionPoolConfigurationImpl(usedFor + "TitanConnectionPool")
.setPort(port)
.setMaxOperationsPerConnection(maxOperationsPerConnection)
.setMaxConnsPerHost(maxConnsPerHost)
.setRetryDelaySlice(retryDelaySlice)
.setRetryMaxDelaySlice(retryMaxDelaySlice)
.setRetrySuspendWindow(retrySuspendWindow)
.setSocketTimeout(connectionTimeout)
.setConnectTimeout(connectionTimeout)
.setSeeds(StringUtils.join(hostnames, ","));
if (null != retryBackoffStrategy) {
cpool.setRetryBackoffStrategy(retryBackoffStrategy);
log.debug("Custom RetryBackoffStrategy {}", cpool.getRetryBackoffStrategy());
} else {
log.debug("Default RetryBackoffStrategy {}", cpool.getRetryBackoffStrategy());
}
if (StringUtils.isNotBlank(localDatacenter)) {
cpool.setLocalDatacenter(localDatacenter);
log.debug("Set local datacenter: {}", cpool.getLocalDatacenter());
}
AstyanaxConfigurationImpl aconf =
new AstyanaxConfigurationImpl()
.setConnectionPoolType(poolType)
.setDiscoveryType(discType)
.setTargetCassandraVersion("1.2");
if (0 < maxConnections) {
cpool.setMaxConns(maxConnections);
}
if (hasAuthentication()) {
cpool.setAuthenticationCredentials(new SimpleAuthenticationCredentials(username, password));
}
if (config.get(SSL_ENABLED)) {
cpool.setSSLConnectionContext(new SSLConnectionContext(config.get(SSL_TRUSTSTORE_LOCATION), config.get(SSL_TRUSTSTORE_PASSWORD)));
}
AstyanaxContext.Builder ctxBuilder = new AstyanaxContext.Builder();
// Standard context builder options
ctxBuilder
.forCluster(clusterName)
.forKeyspace(keySpaceName)
.withAstyanaxConfiguration(aconf)
.withConnectionPoolConfiguration(cpool)
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor());
// Conditional context builder option: host supplier
if (config.has(HOST_SUPPLIER)) {
String hostSupplier = config.get(HOST_SUPPLIER);
Supplier<List<Host>> supplier = null;
if (hostSupplier != null) {
try {
supplier = (Supplier<List<Host>>) Class.forName(hostSupplier).newInstance();
ctxBuilder.withHostSupplier(supplier);
} catch (Exception e) {
log.warn("Problem with host supplier class " + hostSupplier + ", going to use default.", e);
}
}
}
return ctxBuilder;
}
示例15: initializeContext
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType; //导入依赖的package包/类
private AstyanaxContext<Keyspace> initializeContext(final ExecutionContext context, final String keyspaceName) {
/* Will resort hosts per token partition every 10 seconds */
final int updateInterval = 10000;
/* Will clear the latency every 10 seconds */
final int resetInterval = 10000;
/* Uses last 100 latency samples */
final int windowSize = 100;
/*
* Will sort hosts if a host is more than 100% slower than the best and always assign connections to the fastest
* host, otherwise will use round robin
*/
final double badnessThreshold = 0.50;
final SmaLatencyScoreStrategyImpl scoreStrategy = new SmaLatencyScoreStrategyImpl(
updateInterval,
resetInterval,
windowSize,
badnessThreshold
);
final ConnectionPoolConfigurationImpl poolConfig =
new ConnectionPoolConfigurationImpl("CassPool"+ UUID.randomUUID().toString().subSequence(0, 6))
.setPort(context.getPort())
.setSocketTimeout(ConnectionPoolConfigurationImpl.DEFAULT_SOCKET_TIMEOUT)
.setInitConnsPerHost(initConnectionsPerHost) //--> might be the reason for the too many open files
.setConnectTimeout(connectTimeout)
.setMaxConnsPerHost(maxConnectionsPerHost)
.setSeeds(context.getSeedNode());
poolConfig.setLatencyScoreStrategy(scoreStrategy); // Enabled SMA. Omit this to use round robin with a token
return new AstyanaxContext.Builder()
.forCluster(context.getClusterName())
.forKeyspace(keyspaceName)
.withAstyanaxConfiguration(new AstyanaxConfigurationImpl()
.setConnectionPoolType(ConnectionPoolType.TOKEN_AWARE)
.setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE)
.setTargetCassandraVersion(cassandraVersion)
)
.withConnectionPoolConfiguration(poolConfig)
.buildKeyspace(ThriftFamilyFactory.getInstance());
}