| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.lib.pkgcache; |
| |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.events.ExtendedEventHandler; |
| import java.util.Set; |
| |
| /** |
| * Visits a set of Targets and Labels transitively. |
| */ |
| public interface TransitivePackageLoader { |
| |
| /** |
| * Visit the specified labels and follow the transitive closure of their outbound dependencies. If |
| * the targets have previously been visited, may do an up-to-date check which will not trigger any |
| * of the observers. |
| * |
| * @param eventHandler the error and warnings eventHandler; must be thread-safe |
| * @param labelsToVisit the labels to visit in addition to the targets |
| * @param keepGoing if false, stop visitation upon first error |
| * @param parallelThreads number of threads to use in the visitation |
| */ |
| boolean sync( |
| ExtendedEventHandler eventHandler, |
| Set<Label> labelsToVisit, |
| boolean keepGoing, |
| int parallelThreads) |
| throws InterruptedException; |
| } |