| // Copyright 2015 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.skyframe; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Maps; |
| import com.google.devtools.build.skyframe.QueryableGraph.Reason; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.annotation.Nullable; |
| |
| /** |
| * {@link WalkableGraph} that looks nodes up in a {@link QueryableGraph}. |
| */ |
| public class DelegatingWalkableGraph implements WalkableGraph { |
| protected final QueryableGraph graph; |
| |
| public DelegatingWalkableGraph(QueryableGraph graph) { |
| this.graph = graph; |
| } |
| |
| @Nullable |
| private NodeEntry getEntryForValue(SkyKey key) throws InterruptedException { |
| NodeEntry entry = getBatch(null, Reason.WALKABLE_GRAPH_VALUE, ImmutableList.of(key)).get(key); |
| return entry != null && entry.isDone() ? entry : null; |
| } |
| |
| @Nullable |
| @Override |
| public SkyValue getValue(SkyKey key) throws InterruptedException { |
| NodeEntry entry = getEntryForValue(key); |
| return entry == null ? null : entry.getValue(); |
| } |
| |
| private static SkyValue getValue(NodeEntry entry) throws InterruptedException { |
| return entry.isDone() ? entry.getValue() : null; |
| } |
| |
| @Override |
| public Map<SkyKey, SkyValue> getSuccessfulValues(Iterable<SkyKey> keys) |
| throws InterruptedException { |
| Map<SkyKey, ? extends NodeEntry> batchGet = getBatch(null, Reason.WALKABLE_GRAPH_VALUE, keys); |
| Map<SkyKey, SkyValue> result = Maps.newHashMapWithExpectedSize(batchGet.size()); |
| for (Map.Entry<SkyKey, ? extends NodeEntry> entryPair : batchGet.entrySet()) { |
| SkyValue value = getValue(entryPair.getValue()); |
| if (value != null) { |
| result.put(entryPair.getKey(), value); |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public Map<SkyKey, Exception> getMissingAndExceptions(Iterable<SkyKey> keys) |
| throws InterruptedException { |
| Map<SkyKey, Exception> result = new HashMap<>(); |
| Map<SkyKey, ? extends NodeEntry> graphResult = |
| getBatch(null, Reason.WALKABLE_GRAPH_VALUE, keys); |
| for (SkyKey key : keys) { |
| NodeEntry nodeEntry = graphResult.get(key); |
| if (nodeEntry == null || !nodeEntry.isDone()) { |
| result.put(key, null); |
| } else { |
| ErrorInfo errorInfo = nodeEntry.getErrorInfo(); |
| if (errorInfo != null) { |
| result.put(key, errorInfo.getException()); |
| } |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public boolean isCycle(SkyKey key) throws InterruptedException { |
| NodeEntry entry = getEntryForValue(key); |
| if (entry == null) { |
| return false; |
| } |
| ErrorInfo errorInfo = entry.getErrorInfo(); |
| return errorInfo != null && !Iterables.isEmpty(errorInfo.getCycleInfo()); |
| } |
| |
| @Nullable |
| @Override |
| public Exception getException(SkyKey key) throws InterruptedException { |
| NodeEntry entry = getEntryForValue(key); |
| if (entry == null) { |
| return null; |
| } |
| ErrorInfo errorInfo = entry.getErrorInfo(); |
| return errorInfo == null ? null : errorInfo.getException(); |
| } |
| |
| @Override |
| public Map<SkyKey, Iterable<SkyKey>> getDirectDeps(Iterable<SkyKey> keys) |
| throws InterruptedException { |
| Map<SkyKey, ? extends NodeEntry> entries = getBatch(null, Reason.WALKABLE_GRAPH_DEPS, keys); |
| Map<SkyKey, Iterable<SkyKey>> result = new HashMap<>(entries.size()); |
| for (Map.Entry<SkyKey, ? extends NodeEntry> entry : entries.entrySet()) { |
| Preconditions.checkState(entry.getValue().isDone(), entry); |
| result.put(entry.getKey(), entry.getValue().getDirectDeps()); |
| } |
| return result; |
| } |
| |
| @Override |
| public Map<SkyKey, Iterable<SkyKey>> getReverseDeps(Iterable<SkyKey> keys) |
| throws InterruptedException { |
| Map<SkyKey, ? extends NodeEntry> entries = getBatch(null, Reason.WALKABLE_GRAPH_RDEPS, keys); |
| Map<SkyKey, Iterable<SkyKey>> result = new HashMap<>(entries.size()); |
| for (Map.Entry<SkyKey, ? extends NodeEntry> entry : entries.entrySet()) { |
| Preconditions.checkState(entry.getValue().isDone(), entry); |
| result.put(entry.getKey(), entry.getValue().getReverseDepsForDoneEntry()); |
| } |
| return result; |
| } |
| |
| protected Map<SkyKey, ? extends NodeEntry> getBatch( |
| @Nullable SkyKey requestor, Reason reason, Iterable<? extends SkyKey> keys) |
| throws InterruptedException { |
| return graph.getBatch(requestor, reason, keys); |
| } |
| } |