public void invoke()

in flink-connector-cassandra/src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraSinkBase.java [146:157]


    public void invoke(IN value) throws Exception {
        checkAsyncErrors();
        tryAcquire(1);
        final ListenableFuture<V> result;
        try {
            result = send(value);
        } catch (Throwable e) {
            semaphore.release();
            throw e;
        }
        Futures.addCallback(result, callback);
    }