com.mine.cassandra.CassandraConfiguration.java Source code

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Here is the source code for com.mine.cassandra.CassandraConfiguration.java

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/*
 * Copyright 2015 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 com.mine.cassandra;

import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

import com.datastax.driver.core.Session;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cassandra.config.CompressionType;
import org.springframework.cassandra.core.CqlTemplate;
import org.springframework.cassandra.core.keyspace.CreateKeyspaceSpecification;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.cassandra.config.SchemaAction;
import org.springframework.data.cassandra.config.java.AbstractCassandraConfiguration;
import org.springframework.util.StringUtils;

import com.datastax.driver.core.AuthProvider;
import com.datastax.driver.core.PlainTextAuthProvider;

import javax.annotation.PostConstruct;

/**
 * @author Artem Bilan
 * @author Thomas Risberg
 */
@Configuration
@EnableConfigurationProperties(CassandraProperties.class)
public class CassandraConfiguration extends AbstractCassandraConfiguration {

    @Autowired
    CassandraProperties cassandraProperties;

    @Override
    protected String getContactPoints() {
        return cassandraProperties.getContactPoints();
    }

    @Override
    protected int getPort() {
        return cassandraProperties.getPort();
    }

    @Override
    protected String getKeyspaceName() {
        return cassandraProperties.getKeyspace();
    }

    @Override
    protected AuthProvider getAuthProvider() {
        if (StringUtils.hasText(this.cassandraProperties.getUsername())) {
            return new PlainTextAuthProvider(this.cassandraProperties.getUsername(),
                    this.cassandraProperties.getPassword());
        } else {
            return null;
        }
    }

    @Override
    public SchemaAction getSchemaAction() {
        return this.cassandraProperties.getSchemaAction();
    }

    @Override
    public String[] getEntityBasePackages() {
        return this.cassandraProperties.getEntityBasePackages();
    }

    @Override
    protected CompressionType getCompressionType() {
        return this.cassandraProperties.getCompressionType();
    }

    @Override
    protected boolean getMetricsEnabled() {
        return this.cassandraProperties.isMetricsEnabled();
    }

    @Override
    protected List<CreateKeyspaceSpecification> getKeyspaceCreations() {
        if (this.cassandraProperties.isCreateKeyspace()) {
            return Collections.singletonList(CreateKeyspaceSpecification.createKeyspace(getKeyspaceName())
                    .withSimpleReplication().ifNotExists());
        } else {
            return super.getKeyspaceCreations();
        }
    }

    /**
     * Inner class to execute init scripts on the provided {@code keyspace}.
     * It is here to bypass circular dependency with {@link Session} injection and
     * its {@code @amp;Bean} in the {@link AbstractCassandraConfiguration}.
     * From other side we can't use {@link #getStartupScripts()} because they are
     * shared between Cluster and Session initializations.
     */
    @Configuration
    protected static class CassandraKeyspaceInitializerConfiguration {

        @Autowired
        CassandraProperties cassandraProperties;

        @Autowired
        Session session;

        @PostConstruct
        public void init() throws IOException {
            if (this.cassandraProperties.getInitScript() != null) {
                String scripts = new Scanner(this.cassandraProperties.getInitScript().getInputStream(), "UTF-8")
                        .useDelimiter("\\A").next();

                CqlTemplate template = new CqlTemplate(this.session);

                for (String script : StringUtils.delimitedListToStringArray(scripts, ";", "\r\n\f")) {
                    if (StringUtils.hasText(script)) { // an empty String after the last ';'
                        template.execute(script + ";");
                    }
                }
            }
        }

    }

}