io.druid.metadata.SQLFirehoseDatabaseConnector.java Source code

Introduction

Here is the source code for io.druid.metadata.SQLFirehoseDatabaseConnector.java

Source

/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets licenses this file
 * to you 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 io.druid.metadata;

import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.google.common.base.Predicate;
import io.druid.java.util.common.RetryUtils;
import org.apache.commons.dbcp2.BasicDataSource;
import org.skife.jdbi.v2.DBI;
import org.skife.jdbi.v2.exceptions.DBIException;
import org.skife.jdbi.v2.exceptions.UnableToExecuteStatementException;
import org.skife.jdbi.v2.exceptions.UnableToObtainConnectionException;
import org.skife.jdbi.v2.tweak.HandleCallback;

import java.sql.SQLException;
import java.sql.SQLRecoverableException;
import java.sql.SQLTransientException;

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
public abstract class SQLFirehoseDatabaseConnector {
    static final int MAX_RETRIES = 10;

    public <T> T retryWithHandle(HandleCallback<T> callback, Predicate<Throwable> myShouldRetry) {
        try {
            return RetryUtils.retry(() -> getDBI().withHandle(callback), myShouldRetry, MAX_RETRIES);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public final boolean isTransientException(Throwable e) {
        return e != null && (e instanceof RetryTransactionException || e instanceof SQLTransientException
                || e instanceof SQLRecoverableException || e instanceof UnableToObtainConnectionException
                || e instanceof UnableToExecuteStatementException
                || (e instanceof SQLException && isTransientException(e.getCause()))
                || (e instanceof DBIException && isTransientException(e.getCause())));
    }

    protected BasicDataSource getDatasource(MetadataStorageConnectorConfig connectorConfig) {
        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setUsername(connectorConfig.getUser());
        dataSource.setPassword(connectorConfig.getPassword());
        String uri = connectorConfig.getConnectURI();
        dataSource.setUrl(uri);
        dataSource.setTestOnBorrow(true);
        dataSource.setValidationQuery(getValidationQuery());

        return dataSource;
    }

    public String getValidationQuery() {
        return "SELECT 1";
    }

    public abstract DBI getDBI();

}