Examples with Query org.hyperledger.fabric.protos.peer.Query used on opensource projects

Example 1 with Query

use of org.hyperledger.fabric.protos.peer.Query in project fabric-sdk-java by hyperledger.

the class Channel method queryChannels.

// ///////////////////////////////////////////////////////
// transactions order
Set<String> queryChannels(Peer peer) throws InvalidArgumentException, ProposalException {
    checkPeer(peer);
    if (!isSystemChannel()) {
        throw new InvalidArgumentException("queryChannels should only be invoked on system channel.");
    }
    try {
        TransactionContext context = getTransactionContext();
        FabricProposal.Proposal q = QueryPeerChannelsBuilder.newBuilder().context(context).build();
        SignedProposal qProposal = getSignedProposal(context, q);
        Collection<ProposalResponse> proposalResponses = sendProposalToPeers(Collections.singletonList(peer), qProposal, context);
        if (null == proposalResponses) {
            throw new ProposalException(format("Peer %s channel query return with null for responses", peer.getName()));
        }
        if (proposalResponses.size() != 1) {
            throw new ProposalException(format("Peer %s channel query expected one response but got back %d  responses ", peer.getName(), proposalResponses.size()));
        }
        ProposalResponse proposalResponse = proposalResponses.iterator().next();
        if (proposalResponse.getStatus() != ChaincodeResponse.Status.SUCCESS) {
            throw new ProposalException(format("Failed exception message is %s, status is %d", proposalResponse.getMessage(), proposalResponse.getStatus().getStatus()));
        }
        FabricProposalResponse.ProposalResponse fabricResponse = proposalResponse.getProposalResponse();
        if (null == fabricResponse) {
            throw new ProposalException(format("Peer %s channel query return with empty fabric response", peer.getName()));
        }
        final Response fabricResponseResponse = fabricResponse.getResponse();
        if (null == fabricResponseResponse) {
            // not likely but check it.
            throw new ProposalException(format("Peer %s channel query return with empty fabricResponseResponse", peer.getName()));
        }
        if (200 != fabricResponseResponse.getStatus()) {
            throw new ProposalException(format("Peer %s channel query expected 200, actual returned was: %d. " + fabricResponseResponse.getMessage(), peer.getName(), fabricResponseResponse.getStatus()));
        }
        ChannelQueryResponse qr = ChannelQueryResponse.parseFrom(fabricResponseResponse.getPayload());
        Set<String> ret = new HashSet<>(qr.getChannelsCount());
        for (Query.ChannelInfo x : qr.getChannelsList()) {
            ret.add(x.getChannelId());
        }
        return ret;
    } catch (ProposalException e) {
        throw e;
    } catch (Exception e) {
        throw new ProposalException(format("Query for peer %s channels failed. " + e.getMessage(), name), e);
    }
}