com.google.gerrit.pgm.util.SiteLibraryBasedDataSourceProvider.java Source code

Introduction

Here is the source code for com.google.gerrit.pgm.util.SiteLibraryBasedDataSourceProvider.java

Source

// Copyright (C) 2013 The Android Open Source Project
//
// 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.gerrit.pgm.util;

import com.google.common.primitives.Longs;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.schema.DataSourceProvider;
import com.google.gerrit.server.schema.DataSourceType;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import org.eclipse.jgit.lib.Config;

import java.io.File;
import java.io.FileFilter;
import java.util.Arrays;
import java.util.Comparator;

import javax.sql.DataSource;

/** Loads the site library if not yet loaded. */
@Singleton
public class SiteLibraryBasedDataSourceProvider extends DataSourceProvider {
    private final File libdir;
    private boolean init;

    @Inject
    SiteLibraryBasedDataSourceProvider(SitePaths site, @GerritServerConfig Config cfg,
            DataSourceProvider.Context ctx, DataSourceType dst) {
        super(site, cfg, ctx, dst);
        libdir = site.lib_dir;
    }

    public synchronized DataSource get() {
        if (!init) {
            loadSiteLib();
            init = true;
        }
        return super.get();
    }

    private void loadSiteLib() {
        File[] jars = libdir.listFiles(new FileFilter() {
            @Override
            public boolean accept(File path) {
                String name = path.getName();
                return (name.endsWith(".jar") || name.endsWith(".zip")) && path.isFile();
            }
        });
        if (jars != null && 0 < jars.length) {
            Arrays.sort(jars, new Comparator<File>() {
                @Override
                public int compare(File a, File b) {
                    // Sort by reverse last-modified time so newer JARs are first.
                    int cmp = Longs.compare(b.lastModified(), a.lastModified());
                    if (cmp != 0) {
                        return cmp;
                    }
                    return a.getName().compareTo(b.getName());
                }
            });
            IoUtil.loadJARs(jars);
        }
    }
}