org.apache.james.GuiceJamesServerImpl.java Source code

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Here is the source code for org.apache.james.GuiceJamesServerImpl.java

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 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
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package org.apache.james;

import java.util.Arrays;

import javax.annotation.PreDestroy;

import org.apache.james.modules.CommonServicesModule;
import org.apache.james.modules.MailetProcessingModule;
import org.apache.james.modules.ProtocolsModule;
import org.apache.james.onami.lifecycle.Stager;
import org.apache.james.utils.ConfigurationsPerformer;
import org.apache.james.utils.GuiceProbeProvider;
import org.apache.james.utils.GuiceServerProbe;

import com.google.common.collect.Iterables;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Module;
import com.google.inject.TypeLiteral;
import com.google.inject.util.Modules;

public class GuiceJamesServerImpl implements GuiceJamesServer {
    protected final Module module;
    private Stager<PreDestroy> preDestroy;
    private GuiceProbeProvider guiceProbeProvider;

    public GuiceJamesServerImpl() {
        this(Modules.combine(new CommonServicesModule(), new ProtocolsModule(), new MailetProcessingModule()));
    }

    protected GuiceJamesServerImpl(Module module) {
        this.module = module;
    }

    public GuiceJamesServerImpl combineWith(Module... modules) {
        return new GuiceJamesServerImpl(
                Modules.combine(Iterables.concat(Arrays.asList(module), Arrays.asList(modules))));
    }

    public GuiceJamesServerImpl overrideWith(Module... overrides) {
        return new GuiceJamesServerImpl(Modules.override(module).with(overrides));
    }

    @Override
    public void start() throws Exception {
        Injector injector = Guice.createInjector(module);
        preDestroy = injector.getInstance(Key.get(new TypeLiteral<Stager<PreDestroy>>() {
        }));
        injector.getInstance(ConfigurationsPerformer.class).initModules();
        guiceProbeProvider = injector.getInstance(GuiceProbeProvider.class);
    }

    @Override
    public void stop() {
        if (preDestroy != null) {
            preDestroy.stage();
        }
    }

    @Override
    public GuiceServerProbe serverProbe() {
        return guiceProbeProvider.getProbe(GuiceServerProbe.class);
    }

    protected GuiceProbeProvider getGuiceProbeProvider() {
        return guiceProbeProvider;
    }
}