com.stratio.ingestion.sink.cassandra.CassandraUtils.java Source code

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Here is the source code for com.stratio.ingestion.sink.cassandra.CassandraUtils.java

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/**
 * Copyright (C) 2014 Stratio (http://stratio.com)
 *
 * 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.stratio.ingestion.sink.cassandra;

import java.util.ArrayList;
import java.util.List;

import com.datastax.driver.core.DataType;
import com.datastax.driver.core.KeyspaceMetadata;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.TableMetadata;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;

final class CassandraUtils {

    private CassandraUtils() {

    }

    public static void executeCqlScript(final Session session, final String script) {
        if (script == null) {
            return;
        }
        final List<String> lines = new ArrayList<String>();
        for (final String line : Splitter.on("\n").split(script)) {
            lines.add(line.trim());
        }
        for (String cql : Joiner.on(" ").join(lines).split(";")) {
            cql = cql.trim();
            if (cql.isEmpty()) {
                continue;
            }
            session.execute(cql);
        }
    }

    public static TableMetadata getTableMetadata(final Session session, final String keyspace, final String table) {
        Preconditions.checkNotNull(session);
        Preconditions.checkNotNull(keyspace);
        Preconditions.checkNotNull(table);
        final KeyspaceMetadata keyspaceMetadata = session.getCluster().getMetadata().getKeyspace(keyspace);
        if (keyspaceMetadata == null) {
            throw new IllegalStateException(String.format("Keyspace %s does not exist", keyspace));
        }
        final TableMetadata tableMetadata = keyspaceMetadata.getTable(table);
        if (tableMetadata == null) {
            throw new IllegalStateException(String.format("Table %s.%s does not exist", keyspace, table));
        }
        return tableMetadata;
    }

    public static Object parseValue(final DataType type, final String value) {
        if (value == null) {
            return null;
        }
        switch (type.getName()) {
        case TEXT:
        case VARCHAR:
        case ASCII:
            return value;
        case INET:
            return type.parse("'" + value + "'");
        case INT:
        case VARINT:
        case BIGINT:
        case FLOAT:
        case DOUBLE:
        case DECIMAL:
        case BOOLEAN:
            return type.parse(value.replaceAll("\\s+", ""));
        default:
            return type.parse(value);
        }
    }

}