protected final void setInterestOp(int op) {
        final SelectionKey key = this.selectionKey;
        if (!key.isValid()) {
            return;
        }
        final int interestOps = key.interestOps();
        if ((interestOps & op) == 0) {
            key.interestOps(interestOps | op);
        }
    }
Reads raw request from the input stream.
clickhouse-client/src/main/java/com/clickhouse/client/AbstractSocketClient.java