@Override
public void releaseClient(CassandraConnectionHandle conn) throws SQLException {
boolean open;
try {
open = !conn.isClosed();
} catch (SQLException e) {
// Tight to Cassandra Driver implementation. It should not happen.
open = false;
}
if (open) {
if (active.get()) {
addClientToPoolGently(conn);
} else {
log.info("Open client released to in-active pool for host {}. Closing.", cassandraHost);
closeConnection(conn);
}
} else {
try {
addClientToPoolGently(createConnection());
} catch (SQLException e) {
log.info("Unable to reopen a connection. Bad server. Message: " + e.getMessage());
}
}
realActiveConnectionCount.decrementAndGet();
activeConnectionCount.decrementAndGet();
if (log.isDebugEnabled()) {
log.debug("Status of releaseClient {} to queue: {}", cassandraHost.getHost(), open);
}
}
public ConcurrentHClientPool(CassandraHost host) throws SQLException {
this.cassandraHost = host;
ds =
new CassandraDataSource(
cassandraHost.getHost(),
cassandraHost.getPort(),
cassandraHost.getKeyspaceName(),
cassandraHost.getUser(),
cassandraHost.getPassword());
availableConnectionQueue =
new ArrayBlockingQueue<CassandraConnectionHandle>(cassandraHost.getMaxActive(), true);
// This counter can be offset by as much as the number of threads.
activeConnectionCount = new AtomicInteger(0);
realActiveConnectionCount = new AtomicInteger(0);
numBlocked = new AtomicInteger();
active = new AtomicBoolean(true);
maxWaitTimeWhenExhausted =
cassandraHost.getMaxWaitTimeWhenExhausted() < 0
? 0
: cassandraHost.getMaxWaitTimeWhenExhausted();
for (int i = 0; i < cassandraHost.getMaxActive() / 3; i++) {
availableConnectionQueue.add(createConnection());
}
if (log.isDebugEnabled()) {
log.debug(
"Concurrent Host pool started with {} active clients; max: {} exhausted wait: {}",
new Object[] {getNumIdle(), cassandraHost.getMaxActive(), maxWaitTimeWhenExhausted});
}
}
private void closeConnection(CassandraConnectionHandle conn) {
try {
conn.getInternalConnection().close();
} catch (SQLException e) {
log.error("Error closgin connection for: " + cassandraHost.getHost());
}
}