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/*
 * Copyright 2011 the original author or authors.
 *
 * 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 org.gradle.initialization;

import org.gradle.api.artifacts.DependencyResolutionListener;
import org.gradle.api.artifacts.ResolvableDependencies;
import org.gradle.internal.logging.progress.ProgressLogger;
import org.gradle.internal.logging.progress.ProgressLoggerFactory;

import java.util.LinkedList;

public class DependencyResolutionLogger implements DependencyResolutionListener {
    private final ThreadLocal> progressLoggers = new ThreadLocal>() {
        protected LinkedList initialValue() {
            return new LinkedList();
        }
    };
    private final ProgressLoggerFactory loggerFactory;

    public DependencyResolutionLogger(ProgressLoggerFactory loggerFactory) {
        this.loggerFactory = loggerFactory;
    }

    public void beforeResolve(ResolvableDependencies dependencies) {
        LinkedList loggers = progressLoggers.get();
        progressLoggers.set(loggers);
        ProgressLogger logger = loggerFactory.newOperation(DependencyResolutionLogger.class);
        logger.start("Resolve " + dependencies, "Resolving " + dependencies);
        loggers.add(logger);
    }

    public void afterResolve(ResolvableDependencies dependencies) {
        LinkedList loggers = progressLoggers.get();
        if (loggers.isEmpty()) {
            throw new IllegalStateException("Logging operation was not started or it has already completed.");
        }
        ProgressLogger logger = loggers.removeLast();
        logger.completed();
        if (loggers.isEmpty()) {
            progressLoggers.remove();
        }
    }
}