org.dbrain.binder.jdbc.JdbcDatasourceComponent Maven / Gradle / Ivy

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Guice-like facade to the unfriendly HK2 service locator.

There is a newer version: 0.13

/*
 * Copyright [2015] [Eric Poitras]
 *
 *     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.dbrain.binder.jdbc;

import org.dbrain.binder.app.Binder;
import org.dbrain.binder.directory.Qualifiers;
import org.dbrain.binder.lifecycle.TransactionScoped;
import org.dbrain.binder.system.app.QualifiedComponent;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.sql.DataSource;
import java.sql.Connection;


/**
 * This component will bind the following services:
 * Datasource: singleton
 * Connection: transaction scoped
 */
public class JdbcDatasourceComponent extends QualifiedComponent {

    private DataSource dataSource;

    @Inject
    public JdbcDatasourceComponent( Binder.BindingContext cc ) {
        cc.onBind( ( binder ) -> {
            Qualifiers qualifiers = buildQualifiers();
            binder.bind( DataSource.class ) //
                    .to( DataSource.class ) //
                    .providedBy( () -> dataSource ) //
                    .qualifiedBy( qualifiers ) //
                    .in( Singleton.class );

            binder.bind( Connection.class ) //
                    .to( Connection.class ) //
                    .providedBy( () -> dataSource.getConnection() )//
                    .qualifiedBy( qualifiers ) //
                    .in( TransactionScoped.class );
        } );
    }

    @Override
    protected JdbcDatasourceComponent self() {
        return this;
    }

    public JdbcDatasourceComponent dataSource( DataSource dataSource ) {
        this.dataSource = dataSource;
        return this;
    }

}