org.sonar.batch.repository.user.UserRepositoryLoader.java Source code

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Here is the source code for org.sonar.batch.repository.user.UserRepositoryLoader.java

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/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.batch.repository.user;

import org.apache.commons.io.IOUtils;

import org.sonar.batch.cache.WSLoaderResult;
import org.sonar.batch.cache.WSLoader;

import javax.annotation.Nullable;

import org.apache.commons.lang.mutable.MutableBoolean;
import com.google.common.collect.Lists;
import com.google.common.base.Joiner;
import org.sonar.batch.util.BatchUtils;
import com.google.common.base.Function;
import org.sonar.batch.protocol.input.BatchInput;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

public class UserRepositoryLoader {
    private final WSLoader wsLoader;

    public UserRepositoryLoader(WSLoader wsLoader) {
        this.wsLoader = wsLoader;
    }

    public BatchInput.User load(String userLogin) {
        return load(userLogin, null);
    }

    public BatchInput.User load(String userLogin, @Nullable MutableBoolean fromCache) {
        InputStream is = loadQuery(new UserEncodingFunction().apply(userLogin), fromCache);
        return parseUser(is);
    }

    public Collection<BatchInput.User> load(List<String> userLogins) {
        return load(userLogins, null);
    }

    /**
     * Not cache friendly. Should not be used if a cache hit is expected.
     */
    public Collection<BatchInput.User> load(List<String> userLogins, @Nullable MutableBoolean fromCache) {
        if (userLogins.isEmpty()) {
            return Collections.emptyList();
        }
        InputStream is = loadQuery(Joiner.on(',').join(Lists.transform(userLogins, new UserEncodingFunction())),
                fromCache);

        return parseUsers(is);
    }

    private InputStream loadQuery(String loginsQuery, @Nullable MutableBoolean fromCache) {
        WSLoaderResult<InputStream> result = wsLoader.loadStream("/batch/users?logins=" + loginsQuery);
        if (fromCache != null) {
            fromCache.setValue(result.isFromCache());
        }
        return result.get();
    }

    private static class UserEncodingFunction implements Function<String, String> {
        @Override
        public String apply(String input) {
            return BatchUtils.encodeForUrl(input);
        }
    }

    private static BatchInput.User parseUser(InputStream is) {
        try {
            return BatchInput.User.parseDelimitedFrom(is);
        } catch (IOException e) {
            throw new IllegalStateException("Unable to get user details from server", e);
        } finally {
            IOUtils.closeQuietly(is);
        }
    }

    private static Collection<BatchInput.User> parseUsers(InputStream is) {
        List<BatchInput.User> users = new ArrayList<>();

        try {
            BatchInput.User user = BatchInput.User.parseDelimitedFrom(is);
            while (user != null) {
                users.add(user);
                user = BatchInput.User.parseDelimitedFrom(is);
            }
        } catch (IOException e) {
            throw new IllegalStateException("Unable to get user details from server", e);
        } finally {
            IOUtils.closeQuietly(is);
        }

        return users;
    }

}