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// 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.query2;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.concurrent.ThreadSafety;
import com.google.devtools.build.lib.events.Event;
import com.google.devtools.build.lib.events.EventHandler;
import com.google.devtools.build.lib.packages.NoSuchThingException;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.packages.TargetUtils;
/**
* Record errors, such as missing package/target or rules containing errors,
* encountered during visitation. Emit an error message upon encountering
* missing edges
*
* The accessor {@link #hasErrors}) may not be called until the concurrent phase
* is over, i.e. all external calls to visit() methods have completed.
*/
@ThreadSafety.ConditionallyThreadSafe // condition: only call hasErrors
// once the visitation is complete.
class ErrorPrintingTargetEdgeErrorObserver extends TargetEdgeErrorObserver {
private final EventHandler eventHandler;
/**
* @param eventHandler eventHandler to route exceptions to as errors.
*/
public ErrorPrintingTargetEdgeErrorObserver(EventHandler eventHandler) {
this.eventHandler = eventHandler;
}
@ThreadSafety.ThreadSafe
@Override
public void missingEdge(Target target, Label label, NoSuchThingException e)
throws InterruptedException {
eventHandler.handle(Event.error(TargetUtils.getLocationMaybe(target),
TargetUtils.formatMissingEdge(target, label, e)));
super.missingEdge(target, label, e);
}
}
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