Class: Ilios::Cassandra::Future

Inherits:
Object
  • Object
show all
Defined in:
ext/ilios/ilios.c

Instance Method Summary collapse

Instance Method Details

#await ⇒ Cassandra::Future

Wait to complete a future’s statement.

Returns:



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# File 'ext/ilios/future.c', line 299

static VALUE future_await(VALUE self)
{
    CassandraFuture *cassandra_future;

    GET_FUTURE(self, cassandra_future);

    if (cassandra_future->already_waited) {
        return self;
    }

    if (cassandra_future->on_success_block || cassandra_future->on_failure_block) {
        nogvl_sem_wait(&cassandra_future->sem);
    } else {
        nogvl_future_wait(cassandra_future->future);
    }
    cassandra_future->already_waited = true;
    return self;
}

#on_failure ⇒ Cassandra::Future

Run block when future resolves to error.

Returns:

Raises:



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# File 'ext/ilios/future.c', line 254

static VALUE future_on_failure(VALUE self)
{
    CassandraFuture *cassandra_future;
    bool wakeup_thread = false;

    GET_FUTURE(self, cassandra_future);

    if (cassandra_future->on_failure_block) {
        rb_raise(eExecutionError, "It should not call twice");
    }
    if (!rb_block_given_p()) {
        rb_raise(rb_eArgError, "no block given");
    }

    rb_mutex_lock(cassandra_future->proc_mutex);

    if (!cassandra_future->on_success_block) {
        // Invoke the callback with thread pool only once
        wakeup_thread = true;
    }

    cassandra_future->on_failure_block = rb_block_proc();

    if (cass_future_ready(cassandra_future->future)) {
        rb_mutex_unlock(cassandra_future->proc_mutex);
        uv_sem_post(&cassandra_future->sem);
        if (cass_future_error_code(cassandra_future->future) != CASS_OK) {
            future_result_failure_yield(cassandra_future);
        }
        return self;
    }

    if (wakeup_thread) {
        future_queue_push(future_thread_pool_get(cassandra_future), self);
    }
    rb_mutex_unlock(cassandra_future->proc_mutex);

    return self;
}

#on_success {|value| ... } ⇒ Cassandra::Future

Run block when future resolves to a value.

Yield Parameters:

  • value (Cassandra::Statement, Cassandra::Result) —

    A value. Yields Cassandra::Statement object when future was created by Cassandra::Session#prepare_async. Yields Cassandra::Result object when future was created by Cassandra::Session#execute_async.

Returns:

Raises:



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# File 'ext/ilios/future.c', line 207

static VALUE future_on_success(VALUE self)
{
    CassandraFuture *cassandra_future;
    bool wakeup_thread = false;

    GET_FUTURE(self, cassandra_future);

    if (cassandra_future->on_success_block) {
        rb_raise(eExecutionError, "It should not call twice");
    }
    if (!rb_block_given_p()) {
        rb_raise(rb_eArgError, "no block given");
    }

    rb_mutex_lock(cassandra_future->proc_mutex);

    if (!cassandra_future->on_failure_block) {
        // Invoke the callback with thread pool only once
        wakeup_thread = true;
    }

    cassandra_future->on_success_block = rb_block_proc();

    if (cass_future_ready(cassandra_future->future)) {
        rb_mutex_unlock(cassandra_future->proc_mutex);
        uv_sem_post(&cassandra_future->sem);
        if (cass_future_error_code(cassandra_future->future) == CASS_OK) {
            future_result_success_yield(cassandra_future);
        }
        return self;
    }

    if (wakeup_thread) {
        future_queue_push(future_thread_pool_get(cassandra_future), self);
    }
    rb_mutex_unlock(cassandra_future->proc_mutex);

    return self;
}