| /* |
| * Copyright (C) 2016, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.internal.ketch; |
| |
| import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| import static java.util.concurrent.TimeUnit.SECONDS; |
| import static org.eclipse.jgit.internal.ketch.Proposal.State.EXECUTED; |
| import static org.eclipse.jgit.internal.ketch.Proposal.State.QUEUED; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Result.NOT_ATTEMPTED; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_OTHER_REASON; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| |
| import org.eclipse.jgit.internal.JGitText; |
| import org.eclipse.jgit.transport.PreReceiveHook; |
| import org.eclipse.jgit.transport.ProgressSpinner; |
| import org.eclipse.jgit.transport.ReceiveCommand; |
| import org.eclipse.jgit.transport.ReceivePack; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * PreReceiveHook for handling push traffic in a Ketch system. |
| * <p> |
| * Install an instance on {@link org.eclipse.jgit.transport.ReceivePack} to |
| * capture the commands and other connection state and relay them through the |
| * {@link org.eclipse.jgit.internal.ketch.KetchLeader}, allowing the leader to |
| * gain consensus about the new reference state. |
| */ |
| public class KetchPreReceive implements PreReceiveHook { |
| private static final Logger log = LoggerFactory.getLogger(KetchPreReceive.class); |
| |
| private final KetchLeader leader; |
| |
| /** |
| * Construct a hook executing updates through a |
| * {@link org.eclipse.jgit.internal.ketch.KetchLeader}. |
| * |
| * @param leader |
| * leader for this repository. |
| */ |
| public KetchPreReceive(KetchLeader leader) { |
| this.leader = leader; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void onPreReceive(ReceivePack rp, Collection<ReceiveCommand> cmds) { |
| cmds = ReceiveCommand.filter(cmds, NOT_ATTEMPTED); |
| if (cmds.isEmpty()) { |
| return; |
| } |
| |
| try { |
| Proposal proposal = new Proposal(rp.getRevWalk(), cmds) |
| .setPushCertificate(rp.getPushCertificate()) |
| .setAuthor(rp.getRefLogIdent()) |
| .setMessage("push"); //$NON-NLS-1$ |
| leader.queueProposal(proposal); |
| if (proposal.isDone()) { |
| // This failed fast, e.g. conflict or bad precondition. |
| return; |
| } |
| |
| ProgressSpinner spinner = new ProgressSpinner( |
| rp.getMessageOutputStream()); |
| if (proposal.getState() == QUEUED) { |
| waitForQueue(proposal, spinner); |
| } |
| if (!proposal.isDone()) { |
| waitForPropose(proposal, spinner); |
| } |
| } catch (IOException | InterruptedException e) { |
| String msg = JGitText.get().transactionAborted; |
| for (ReceiveCommand cmd : cmds) { |
| if (cmd.getResult() == NOT_ATTEMPTED) { |
| cmd.setResult(REJECTED_OTHER_REASON, msg); |
| } |
| } |
| log.error(msg, e); |
| } |
| } |
| |
| private void waitForQueue(Proposal proposal, ProgressSpinner spinner) |
| throws InterruptedException { |
| spinner.beginTask(KetchText.get().waitingForQueue, 1, SECONDS); |
| while (!proposal.awaitStateChange(QUEUED, 250, MILLISECONDS)) { |
| spinner.update(); |
| } |
| switch (proposal.getState()) { |
| case RUNNING: |
| default: |
| spinner.endTask(KetchText.get().starting); |
| break; |
| |
| case EXECUTED: |
| spinner.endTask(KetchText.get().accepted); |
| break; |
| |
| case ABORTED: |
| spinner.endTask(KetchText.get().failed); |
| break; |
| } |
| } |
| |
| private void waitForPropose(Proposal proposal, ProgressSpinner spinner) |
| throws InterruptedException { |
| spinner.beginTask(KetchText.get().proposingUpdates, 2, SECONDS); |
| while (!proposal.await(250, MILLISECONDS)) { |
| spinner.update(); |
| } |
| spinner.endTask(proposal.getState() == EXECUTED |
| ? KetchText.get().accepted |
| : KetchText.get().failed); |
| } |
| } |