Examples with ValueReference zmq.util.ValueReference used on opensource projects

Example 16 with ValueReference

use of zmq.util.ValueReference in project jeromq by zeromq.

the class Router method xhasIn.

@Override
protected boolean xhasIn() {
    // definitely more parts available.
    if (moreIn) {
        return true;
    }
    // We may already have a message pre-fetched.
    if (prefetched) {
        return true;
    }
    // Try to read the next message.
    // The message, if read, is kept in the pre-fetch buffer.
    ValueReference<Pipe> pipe = new ValueReference<>();
    prefetchedMsg = fq.recvPipe(errno, pipe);
    // TODO: handle the situation when the peer changes its identity.
    while (prefetchedMsg != null && prefetchedMsg.isIdentity()) {
        prefetchedMsg = fq.recvPipe(errno, pipe);
    }
    if (prefetchedMsg == null) {
        return false;
    }
    assert (pipe.get() != null);
    Blob identity = pipe.get().getIdentity();
    prefetchedId = new Msg(identity.data());
    prefetchedId.setFlags(Msg.MORE);
    prefetched = true;
    identitySent = false;
    return true;
}

Example 17 with ValueReference

use of zmq.util.ValueReference in project jeromq by zeromq.

the class Router method xrecv.

@Override
protected Msg xrecv() {
    Msg msg;
    if (prefetched) {
        if (!identitySent) {
            msg = prefetchedId;
            prefetchedId = null;
            identitySent = true;
        } else {
            msg = prefetchedMsg;
            prefetchedMsg = null;
            prefetched = false;
        }
        moreIn = msg.hasMore();
        return msg;
    }
    ValueReference<Pipe> pipe = new ValueReference<>();
    msg = fq.recvPipe(errno, pipe);
    // TODO: handle the situation when the peer changes its identity.
    while (msg != null && msg.isIdentity()) {
        msg = fq.recvPipe(errno, pipe);
    }
    if (msg == null) {
        return null;
    }
    assert (pipe.get() != null);
    // If we are in the middle of reading a message, just return the next part.
    if (moreIn) {
        moreIn = msg.hasMore();
    } else {
        // We are at the beginning of a message.
        // Keep the message part we have in the prefetch buffer
        // and return the ID of the peer instead.
        prefetchedMsg = msg;
        prefetched = true;
        Blob identity = pipe.get().getIdentity();
        msg = new Msg(identity.data());
        msg.setFlags(Msg.MORE);
        identitySent = true;
    }
    return msg;
}

Example 18 with ValueReference

use of zmq.util.ValueReference in project jeromq by zeromq.

the class Stream method xhasIn.

@Override
protected boolean xhasIn() {
    // We may already have a message pre-fetched.
    if (prefetched) {
        return true;
    }
    // Try to read the next message.
    // The message, if read, is kept in the pre-fetch buffer.
    ValueReference<Pipe> pipe = new ValueReference<>();
    prefetchedMsg = fq.recvPipe(errno, pipe);
    if (prefetchedMsg == null) {
        return false;
    }
    assert (pipe.get() != null);
    assert (!prefetchedMsg.hasMore());
    Blob identity = pipe.get().getIdentity();
    prefetchedId = new Msg(identity.data());
    // forward metadata (if any)
    Metadata metadata = prefetchedMsg.getMetadata();
    if (metadata != null) {
        prefetchedId.setMetadata(metadata);
    }
    prefetchedId.setFlags(Msg.MORE);
    prefetched = true;
    identitySent = false;
    return true;
}

Example 19 with ValueReference

use of zmq.util.ValueReference in project jeromq by zeromq.

the class Stream method xrecv.

@Override
public Msg xrecv() {
    Msg msg;
    if (prefetched) {
        if (!identitySent) {
            msg = prefetchedId;
            prefetchedId = null;
            identitySent = true;
        } else {
            msg = prefetchedMsg;
            prefetchedMsg = null;
            prefetched = false;
        }
        return msg;
    }
    ValueReference<Pipe> pipe = new ValueReference<>();
    prefetchedMsg = fq.recvPipe(errno, pipe);
    // TODO DIFF V4 we sometimes need to process the commands to receive data, let's just return and give it another chance
    if (prefetchedMsg == null) {
        errno.set(ZError.EAGAIN);
        return null;
    }
    assert (pipe.get() != null);
    assert (!prefetchedMsg.hasMore());
    // We have received a frame with TCP data.
    // Rather than sending this frame, we keep it in prefetched
    // buffer and send a frame with peer's ID.
    Blob identity = pipe.get().getIdentity();
    msg = new Msg(identity.data());
    // forward metadata (if any)
    Metadata metadata = prefetchedMsg.getMetadata();
    if (metadata != null) {
        msg.setMetadata(metadata);
    }
    msg.setFlags(Msg.MORE);
    prefetched = true;
    identitySent = true;
    return msg;
}