Examples with MemoizedSupplier org.apache.ratis.util.MemoizedSupplier used on opensource projects

Example 1 with MemoizedSupplier

use of org.apache.ratis.util.MemoizedSupplier in project incubator-ratis by apache.

the class DataStreamManagement method readImpl.

private void readImpl(DataStreamRequestByteBuf request, ChannelHandlerContext ctx, ByteBuf buf, CheckedBiFunction<RaftClientRequest, Set<RaftPeer>, Set<DataStreamOutputRpc>, IOException> getStreams) {
    boolean close = WriteOption.containsOption(request.getWriteOptions(), StandardWriteOption.CLOSE);
    ClientInvocationId key = ClientInvocationId.valueOf(request.getClientId(), request.getStreamId());
    final StreamInfo info;
    if (request.getType() == Type.STREAM_HEADER) {
        final MemoizedSupplier<StreamInfo> supplier = JavaUtils.memoize(() -> newStreamInfo(buf, getStreams));
        info = streams.computeIfAbsent(key, id -> supplier.get());
        if (!supplier.isInitialized()) {
            streams.remove(key);
            throw new IllegalStateException("Failed to create a new stream for " + request + " since a stream already exists Key: " + key + " StreamInfo:" + info);
        }
        getMetrics().onRequestCreate(RequestType.HEADER);
    } else if (close) {
        info = Optional.ofNullable(streams.remove(key)).orElseThrow(() -> new IllegalStateException("Failed to remove StreamInfo for " + request));
    } else {
        info = Optional.ofNullable(streams.get(key)).orElseThrow(() -> {
            streams.remove(key);
            return new IllegalStateException("Failed to get StreamInfo for " + request);
        });
    }
    final CompletableFuture<Long> localWrite;
    final List<CompletableFuture<DataStreamReply>> remoteWrites;
    if (request.getType() == Type.STREAM_HEADER) {
        localWrite = CompletableFuture.completedFuture(0L);
        remoteWrites = Collections.emptyList();
    } else if (request.getType() == Type.STREAM_DATA) {
        localWrite = info.getLocal().write(buf, request.getWriteOptions(), writeExecutor);
        remoteWrites = info.applyToRemotes(out -> out.write(request, requestExecutor));
    } else {
        throw new IllegalStateException(this + ": Unexpected type " + request.getType() + ", request=" + request);
    }
    composeAsync(info.getPrevious(), requestExecutor, n -> JavaUtils.allOf(remoteWrites).thenCombineAsync(localWrite, (v, bytesWritten) -> {
        if (request.getType() == Type.STREAM_HEADER || (request.getType() == Type.STREAM_DATA && !close)) {
            sendReply(remoteWrites, request, bytesWritten, info.getCommitInfos(), ctx);
        } else if (close) {
            if (info.isPrimary()) {
                // after all server close stream, primary server start transaction
                startTransaction(info, request, bytesWritten, ctx);
            } else {
                sendReply(remoteWrites, request, bytesWritten, info.getCommitInfos(), ctx);
            }
        } else {
            throw new IllegalStateException(this + ": Unexpected type " + request.getType() + ", request=" + request);
        }
        return null;
    }, requestExecutor)).whenComplete((v, exception) -> {
        try {
            if (exception != null) {
                streams.remove(key);
                replyDataStreamException(server, exception, info.getRequest(), request, ctx);
            }
        } finally {
            buf.release();
        }
    });
}