package com.netflix.astyanax.cql;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import com.codahale.metrics.Counter;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Histogram;
import com.codahale.metrics.Meter;
import com.codahale.metrics.MetricRegistryListener;
import com.codahale.metrics.Timer;
import com.datastax.driver.core.Cluster;
import com.netflix.astyanax.connectionpool.ConnectionPoolMonitor;
import com.netflix.astyanax.connectionpool.Host;
import com.netflix.astyanax.connectionpool.HostConnectionPool;
import com.netflix.astyanax.connectionpool.HostStats;
public class JavaDriverConnectionPoolMonitorImpl implements ConnectionPoolMonitor {
private final AtomicReference<Cluster> cluster = new AtomicReference<Cluster>();
private MetricRegistryListener metricsRegListener = new MetricRegistryListener(){
@Override
public void onGaugeAdded(String name, Gauge<?> gauge) {
// TODO Auto-generated method stub
}
@Override
public void onGaugeRemoved(String name) {
// TODO Auto-generated method stub
}
@Override
public void onCounterAdded(String name, Counter counter) {
// TODO Auto-generated method stub
}
@Override
public void onCounterRemoved(String name) {
// TODO Auto-generated method stub
}
@Override
public void onHistogramAdded(String name, Histogram histogram) {
// TODO Auto-generated method stub
}
@Override
public void onHistogramRemoved(String name) {
// TODO Auto-generated method stub
}
@Override
public void onMeterAdded(String name, Meter meter) {
// TODO Auto-generated method stub
}
@Override
public void onMeterRemoved(String name) {
// TODO Auto-generated method stub
}
@Override
public void onTimerAdded(String name, Timer timer) {
// TODO Auto-generated method stub
}
@Override
public void onTimerRemoved(String name) {
// TODO Auto-generated method stub
}};
public JavaDriverConnectionPoolMonitorImpl() {
}
public JavaDriverConnectionPoolMonitorImpl withJavaDriverMetricsRegistry(MetricRegistryListener metricsRegListener){
this.metricsRegListener = metricsRegListener;
return this;
}
public MetricRegistryListener getMetricsRegistryListener(){
return metricsRegListener;
}
/**
* Returns the number of Cassandra hosts currently known by the driver (that is
* whether they are currently considered up or down).
*
* @return the number of Cassandra hosts currently known by the driver.
*/
@Override
public long getHostCount() {
return cluster.get().getMetrics().getKnownHosts().getValue();
}
/**
* Returns the number of Cassandra hosts the driver is currently connected to
* (that is have at least one connection opened to).
*
* @return the number of Cassandra hosts the driver is currently connected to.
*/
@Override
public long getHostActiveCount() {
return cluster.get().getMetrics().getConnectedToHosts().getValue();
}
/**
* Returns the total number of currently opened connections to Cassandra hosts.
*
* @return The total number of currently opened connections to Cassandra hosts.
*/
public long getNumOpenConnections() {
return cluster.get().getMetrics().getOpenConnections().getValue();
}
/**
* Returns the number of connection to Cassandra nodes errors.
* <p>
* This represents the number of times that a request to a Cassandra node
* has failed due to a connection problem. This thus also corresponds to
* how often the driver had to pick a fallback host for a request.
* <p>
* You can expect a few connection errors when a Cassandra node fails
* (or is stopped) ,but if that number grows continuously you likely have
* a problem.
*
* @return the number of connection to Cassandra nodes errors.
*/
@Override
public long getConnectionCreateFailedCount() {
return cluster.get().getMetrics().getErrorMetrics().getConnectionErrors().getCount();
}
/**
* Returns the number of write requests that returned a timeout (independently
* of the final decision taken by the {@link com.datastax.driver.core.policies.RetryPolicy}).
*
* @return the number of write timeout.
*/
public long getWriteTimeouts() {
return cluster.get().getMetrics().getErrorMetrics().getWriteTimeouts().getCount();
}
/**
* Returns the number of read requests that returned a timeout (independently
* of the final decision taken by the {@link com.datastax.driver.core.policies.RetryPolicy}).
*
* @return the number of read timeout.
*/
public long getReadTimeouts() {
return cluster.get().getMetrics().getErrorMetrics().getReadTimeouts().getCount();
}
/**
* Returns the number of requests that returned errors not accounted for by
* another metric. This includes all types of invalid requests.
*
* @return the number of requests errors not accounted by another
* metric.
*/
@Override
public long getBadRequestCount() {
return cluster.get().getMetrics().getErrorMetrics().getOthers().getCount();
}
/**
* Returns the number of requests that returned an unavailable exception
* (independently of the final decision taken by the
* {@link com.datastax.driver.core.policies.RetryPolicy}).
*
* @return the number of unavailable exceptions.
*/
@Override
public long notFoundCount() {
return cluster.get().getMetrics().getErrorMetrics().getUnavailables().getCount();
}
/**
* Returns the number of times a request was ignored
* due to the {@link com.datastax.driver.core.policies.RetryPolicy}, for
* example due to timeouts or unavailability.
*
* @return the number of times a request was ignored due to the
* {@link com.datastax.driver.core.policies.RetryPolicy}.
*/
@Override
public long getSocketTimeoutCount() {
return cluster.get().getMetrics().getErrorMetrics().getIgnores().getCount();
}
/**
* Returns the number of times a request was retried due to the
* {@link com.datastax.driver.core.policies.RetryPolicy}.
*
* @return the number of times a requests was retried due to the
* {@link com.datastax.driver.core.policies.RetryPolicy}.
*/
@Override
public long getUnknownErrorCount() {
return cluster.get().getMetrics().getErrorMetrics().getRetries().getCount();
}
@Override
public void incOperationFailure(Host host, Exception reason) {
// TODO Auto-generated method stub
}
@Override
public long getOperationFailureCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void incFailover(Host host, Exception reason) {
// TODO Auto-generated method stub
}
@Override
public long getFailoverCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void incOperationSuccess(Host host, long latency) {
// TODO Auto-generated method stub
}
@Override
public long getOperationSuccessCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void incConnectionCreated(Host host) {
// TODO Auto-generated method stub
}
@Override
public long getConnectionCreatedCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void incConnectionClosed(Host host, Exception reason) {
// TODO Auto-generated method stub
}
@Override
public long getConnectionClosedCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void incConnectionCreateFailed(Host host, Exception reason) {
// TODO Auto-generated method stub
}
@Override
public void incConnectionBorrowed(Host host, long delay) {
// TODO Auto-generated method stub
}
@Override
public long getConnectionBorrowedCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getConnectionReturnedCount() {
return 0;
}
@Override
public void incConnectionReturned(Host host) {
// TODO Auto-generated method stub
}
@Override
public long getPoolExhaustedTimeoutCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getOperationTimeoutCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getNoHostCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getInterruptedCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getTransportErrorCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getHostAddedCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getHostRemovedCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public long getHostDownCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void onHostAdded(Host host, HostConnectionPool<?> pool) {
// TODO Auto-generated method stub
}
@Override
public void onHostRemoved(Host host) {
// TODO Auto-generated method stub
}
@Override
public void onHostDown(Host host, Exception reason) {
// TODO Auto-generated method stub
}
@Override
public void onHostReactivated(Host host, HostConnectionPool<?> pool) {
// TODO Auto-generated method stub
}
@Override
public Map<Host, HostStats> getHostStats() {
// TODO Auto-generated method stub
return null;
}
}