/*
* Copyright (c) 2016 Rackspace.
*
* 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.rackspacecloud.blueflood.io;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Strings;
import com.rackspacecloud.blueflood.io.astyanax.*;
import com.rackspacecloud.blueflood.io.datastax.*;
import com.rackspacecloud.blueflood.service.Configuration;
import com.rackspacecloud.blueflood.service.CoreConfig;
import com.rackspacecloud.blueflood.utils.DefaultClockImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class holds the necessary IO classes for a particular driver type.
*/
public class IOContainer {
// These are numerous IO factories designed to read/write data from/to
// individual Column Family. Instead of creating factory classes for
// each one, I elected to take a short-cut and create one for all
// of them
private static final Configuration configuration = Configuration.getInstance();
private static final Logger LOG = LoggerFactory.getLogger(IOContainer.class);
private static IOContainer FROM_CONFIG_INSTANCE = null;
private ShardStateIO shardStateIO;
private MetadataIO metadataIO;
private LocatorIO locatorIO;
private DelayedLocatorIO delayedLocatorIO;
private AbstractMetricsRW preAggregatedMetricsRW;
private AbstractMetricsRW basicMetricsRW;
// more IO classes to follow
/**
* Returns an instance of this class based on what configuration says our
* driver should be.
*
* @return IOContainer
*/
public static synchronized IOContainer fromConfig() {
if ( FROM_CONFIG_INSTANCE == null ) {
String driver = configuration.getStringProperty(CoreConfig.CASSANDRA_DRIVER);
LOG.info(String.format("Using driver %s", driver));
boolean isRecordingDelayedMetrics = configuration.getBooleanProperty(CoreConfig.RECORD_DELAYED_METRICS);
LOG.info(String.format("Recording delayed metrics: %s", isRecordingDelayedMetrics));
boolean isDtxIngestBatchEnabled = configuration.getBooleanProperty(CoreConfig.ENABLE_DTX_INGEST_BATCH);
LOG.info(String.format("Datastax Ingest batch enabled: %s", isDtxIngestBatchEnabled));
FROM_CONFIG_INSTANCE = new IOContainer(DriverType.getDriverType(driver),
isRecordingDelayedMetrics,
isDtxIngestBatchEnabled);
}
return FROM_CONFIG_INSTANCE;
}
@VisibleForTesting
static synchronized void resetInstance() {
FROM_CONFIG_INSTANCE = null;
}
/**
* Construct an instance of this class based on the specified
* {@link com.rackspacecloud.blueflood.io.IOContainer.DriverType}
*
* @param driver
* @param isRecordingDelayedMetrics
*/
private IOContainer(DriverType driver,
boolean isRecordingDelayedMetrics,
boolean isDtxIngestBatchEnabled) {
if ( driver == DriverType.DATASTAX ) {
metadataIO = new DMetadataIO();
shardStateIO = new DShardStateIO();
locatorIO = new DLocatorIO();
delayedLocatorIO = new DDelayedLocatorIO();
basicMetricsRW = new DBasicMetricsRW((DLocatorIO)locatorIO, (DDelayedLocatorIO) delayedLocatorIO,
isRecordingDelayedMetrics, isDtxIngestBatchEnabled, new DefaultClockImpl());
preAggregatedMetricsRW = new DPreaggregatedMetricsRW((DLocatorIO)locatorIO, (DDelayedLocatorIO) delayedLocatorIO,
isRecordingDelayedMetrics, isDtxIngestBatchEnabled, new DefaultClockImpl());
} else {
metadataIO = new AMetadataIO();
shardStateIO = new AShardStateIO();
locatorIO = new ALocatorIO();
delayedLocatorIO = new ADelayedLocatorIO();
basicMetricsRW = new ABasicMetricsRW(isRecordingDelayedMetrics, new DefaultClockImpl());
preAggregatedMetricsRW = new APreaggregatedMetricsRW(isRecordingDelayedMetrics, new DefaultClockImpl());
}
}
/**
* @return a class for reading/writing ShardState
*/
public ShardStateIO getShardStateIO() {
return shardStateIO;
}
/**
* @return a class for reading/writing Metadata
*/
public MetadataIO getMetadataIO() {
return metadataIO;
}
/**
* @return a class for reading/writing Locators
*/
public LocatorIO getLocatorIO() {
return locatorIO;
}
/**
* @return a class for reading/writing delayed locators
*/
public DelayedLocatorIO getDelayedLocatorIO() {
return delayedLocatorIO;
}
/**
* @return a class for reading/writing pre-aggregated metrics
*/
public AbstractMetricsRW getPreAggregatedMetricsRW() {
return preAggregatedMetricsRW;
}
/**
* Sets the {@link com.rackspacecloud.blueflood.io.MetricsRW}
*
* @param preAggregatedMetricsRW
*/
public void setPreAggregatedMetricsRW(AbstractMetricsRW preAggregatedMetricsRW) {
this.preAggregatedMetricsRW = preAggregatedMetricsRW;
}
/**
* @return a class for reading/writing basic metrics
*/
public AbstractMetricsRW getBasicMetricsRW() {
return basicMetricsRW;
}
/**
*
* @param basicMetricsRW
*/
public void setBasicMetricsRW(AbstractMetricsRW basicMetricsRW) {
this.basicMetricsRW = basicMetricsRW;
}
/**
* An enumeration of the possible driver type
*/
public static enum DriverType {
ASTYANAX("astyanax"),
DATASTAX("datastax");
private DriverType(String driver) {
name = driver;
}
private String name;
public String getName() {
return name;
}
/**
* From a string value indicating driver type, return the corresponding
* {@link com.rackspacecloud.blueflood.io.IOContainer.DriverType} value.
* The typical use of this method is one where a driver type string is read
* from a configuration file.
*
* @param driver
* @return
*/
public static DriverType getDriverType(String driver) {
// if driver is explicitly datastax, then return DATASTAX
// anything else, return ASTYANAX
if ( ! Strings.isNullOrEmpty(driver) && DriverType.valueOf(driver.toUpperCase()) == DATASTAX ) {
return DATASTAX;
}
return ASTYANAX;
}
}
}