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com.qubole.rubix.core.CachingFileSystem Maven / Gradle / Ivy
/**
* Copyright (c) 2019. Qubole Inc
* 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. See accompanying LICENSE file.
*/
package com.qubole.rubix.core;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Strings;
import com.google.common.base.Throwables;
import com.qubole.rubix.common.metrics.CustomMetricsReporterProvider;
import com.qubole.rubix.spi.BookKeeperFactory;
import com.qubole.rubix.spi.CacheConfig;
import com.qubole.rubix.spi.ClusterManager;
import com.qubole.rubix.spi.ClusterType;
import com.qubole.rubix.spi.thrift.BookKeeperService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.BufferedFSInputStream;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FilterFileSystem;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.util.Progressable;
import org.weakref.jmx.MBeanExporter;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Constructor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.net.URI;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import static com.google.common.base.Preconditions.checkState;
import static com.qubole.rubix.common.utils.ClusterUtil.applyRubixSiteConfig;
import static com.qubole.rubix.spi.CacheUtil.skipCache;
/**
* Created by stagra on 29/12/15.
*/
public abstract class CachingFileSystem extends FilterFileSystem
{
private static final Log log = LogFactory.getLog(CachingFileSystem.class);
private static volatile BookKeeperFactory bookKeeperFactory = new BookKeeperFactory();
public static final String STATS_MBEAN_NAME_BASE = "rubix:name=stats";
public static final String DETAILED_STATS_MBEAN_NAME_BASE = "rubix:name=stats,type=detailed";
// statics that need to initialized after the configuration object is available
private static final AtomicBoolean initialized = new AtomicBoolean(false);
private static volatile String statsMBeanName = STATS_MBEAN_NAME_BASE;
private static volatile String detailedStatsMBeanName = DETAILED_STATS_MBEAN_NAME_BASE;
private static volatile ClusterManager clusterManager;
private static volatile CachingFileSystemStatsProvider stats;
private boolean isRubixSchemeUsed;
private URI uri;
private Path workingDir;
private long splitSize;
private static void initialize(Configuration conf, ClusterType clusterType)
throws IOException
{
if (initialized.get()) {
return;
}
synchronized (initialized) {
if (initialized.get()) {
return;
}
if (!CacheConfig.isEmbeddedModeEnabled(conf)) {
// do not initialize stats automatically in embedded mode.
// it will be done in setLocalBookKeeper
initializeStats(conf);
}
try {
initializeClusterManager(conf, clusterType);
} catch (ClusterManagerInitilizationException e) {
throw new IOException(e);
}
initialized.set(true);
}
}
// Deinitialization rouitne for unit test which needs reinitialize CachingFileSystem multiple times with
// different configurations.
@VisibleForTesting
public static void deinitialize() {
clusterManager = null;
statsMBeanName = STATS_MBEAN_NAME_BASE;
detailedStatsMBeanName = DETAILED_STATS_MBEAN_NAME_BASE;
initialized.set(false);
}
private static void initializeStats(Configuration conf)
{
MBeanExporter exporter = new MBeanExporter(ManagementFactory.getPlatformMBeanServer());
stats = new CachingFileSystemStatsProvider();
try {
if (ManagementFactory.getPlatformMBeanServer().isRegistered(new ObjectName(statsMBeanName))) {
exporter.unexport(statsMBeanName);
}
if (!ManagementFactory.getPlatformMBeanServer().isRegistered(new ObjectName(statsMBeanName))) {
exporter.export(statsMBeanName, new BasicCachingFileSystemStats(stats, bookKeeperFactory, conf));
}
if (ManagementFactory.getPlatformMBeanServer().isRegistered(new ObjectName(detailedStatsMBeanName))) {
exporter.unexport(detailedStatsMBeanName);
}
if (!ManagementFactory.getPlatformMBeanServer().isRegistered(new ObjectName(detailedStatsMBeanName))) {
exporter.export(detailedStatsMBeanName, new DetailedCachingFileSystemStats(stats, bookKeeperFactory, conf));
}
}
catch (MalformedObjectNameException e) {
throw new RuntimeException("Could not load MBean", e);
}
}
private static void initializeClusterManager(Configuration conf, ClusterType clusterType)
throws ClusterManagerInitilizationException
{
if (clusterManager != null) {
return;
}
String clusterManagerClassName = CacheConfig.getClusterManagerClass(conf, clusterType);
log.debug("Initializing cluster manager : " + clusterManagerClassName);
try {
Class clusterManagerClass = conf.getClassByName(clusterManagerClassName);
Constructor constructor = clusterManagerClass.getConstructor();
ClusterManager manager = (ClusterManager) constructor.newInstance();
manager.initialize(conf);
clusterManager = manager;
}
catch (Exception ex) {
String errorMessage = "Not able to initialize ClusterManager class: " + clusterManagerClassName;
log.error(errorMessage, ex);
throw new ClusterManagerInitilizationException(errorMessage, ex);
}
}
// this magic is necessary to create an instance of type T
@SuppressWarnings("unchecked")
private Class getTypeParameterClass()
{
Type type = getClass().getGenericSuperclass();
ParameterizedType paramType = (ParameterizedType) type;
return (Class) paramType.getActualTypeArguments()[0];
}
public CachingFileSystem()
{
try {
this.fs = getTypeParameterClass().newInstance();
}
catch (InstantiationException | IllegalAccessException e) {
log.error("cannot instantiate base filesystem ", e);
Throwables.propagate(e);
}
}
public FileSystem getRemoteFileSystem()
{
return fs;
}
public static void setLocalBookKeeper(Configuration configuration, BookKeeperService.Iface bookKeeper, String statsMbeanSuffix)
{
checkState(!initialized.get(), "LocalBookKeeper should be set before opening up the Filesystem to clients");
bookKeeperFactory = new BookKeeperFactory(bookKeeper);
if (!Strings.isNullOrEmpty(statsMbeanSuffix)) {
statsMBeanName = statsMBeanName + "," + statsMbeanSuffix;
detailedStatsMBeanName = detailedStatsMBeanName + "," + statsMbeanSuffix;
}
initializeStats(configuration);
}
public abstract String getScheme();
@Override
public void initialize(URI uri, Configuration conf) throws IOException
{
conf = applyRubixSiteConfig(conf);
initialize(conf, getClusterType());
super.initialize(getOriginalURI(uri), conf);
CustomMetricsReporterProvider.initialize(conf);
this.uri = URI.create(uri.getScheme() + "://" + uri.getAuthority());
this.workingDir = new Path("/user", System.getProperty("user.name")).makeQualified(this);
isRubixSchemeUsed = uri.getScheme().equals(CacheConfig.RUBIX_SCHEME);
this.splitSize = CacheConfig.getCacheFileSplitSize(conf);
}
public abstract ClusterType getClusterType();
@Override
public URI getUri()
{
return this.uri;
}
@Override
public FSDataInputStream open(Path path, int bufferSize)
throws IOException
{
if (skipCache(path.toString(), getConf())) {
return fs.open(path, bufferSize);
}
Path originalPath = new Path(getOriginalURI(path.toUri()).getScheme(), path.toUri().getAuthority(),
path.toUri().getPath());
if (CacheConfig.isDummyModeEnabled(this.getConf())) {
return new FSDataInputStream(
new BufferedFSInputStream(
new DummyModeCachingInputStream(this, originalPath, this.getConf(), stats,
clusterManager.getClusterType(), bookKeeperFactory, fs, bufferSize, statistics),
CacheConfig.getBlockSize(getConf())));
}
try {
return new FSDataInputStream(
new BufferedFSInputStream(
new CachingInputStream(originalPath, this.getConf(), stats,
clusterManager.getClusterType(), bookKeeperFactory, fs, bufferSize, statistics),
CacheConfig.getBlockSize(getConf())));
}
catch (Exception e) {
if (CacheConfig.isStrictMode(this.getConf())) {
log.error("Error in opening Caching Input Stream", e);
throw e;
}
log.warn("Error in opening Caching Input Stream, skipping cache", e);
return fs.open(path, bufferSize);
}
}
@Override
public FSDataOutputStream create(Path path, FsPermission fsPermission, boolean b, int i, short i1, long l, Progressable progressable)
throws IOException
{
//CachingInputStream.invalidate(path);
return fs.create(path, fsPermission, b, i, i1, l, progressable);
}
@Override
public FSDataOutputStream append(Path path, int i, Progressable progressable)
throws IOException
{
//CachingInputStream.invalidate(path);
return fs.append(path, i, progressable);
}
@Override
public boolean rename(Path path, Path path1)
throws IOException
{
//CachingInputStream.invalidate(path);
//CachingInputStream.invalidate(path1);
return fs.rename(path, path1);
}
@Override
public boolean delete(Path path)
throws IOException
{
// TODO: Support directory invalidation
// When we do support caching file listings, we should invalidate that cache here
// Invalidation in that cache will be responsible to call CachingInputStream.invalidate()
// for each file listing in the path
//CachingInputStream.invalidate(path);
return fs.delete(path);
}
@Override
public boolean delete(Path path, boolean b)
throws IOException
{
// TODO: Support directory invalidation, same as in delete(Path)
//CachingInputStream.invalidate(path);
return fs.delete(path, b);
}
@Override
public FileStatus[] listStatus(Path path)
throws FileNotFoundException, IOException
{
FileStatus[] files = fs.listStatus(path);
for (int i = 0; i < files.length; i++) {
files[i].setPath(getRubixPath(files[i].getPath(), isRubixSchemeUsed));
}
return files;
}
@Override
public void setWorkingDirectory(Path path)
{
this.workingDir = path;
}
@Override
public Path getWorkingDirectory()
{
return this.workingDir;
}
@Override
public boolean mkdirs(Path path, FsPermission fsPermission)
throws IOException
{
return fs.mkdirs(path, fsPermission);
}
@Override
public FileStatus getFileStatus(Path path)
throws IOException
{
FileStatus originalStatus = fs.getFileStatus(path);
originalStatus.setPath(getRubixPath(originalStatus.getPath(), isRubixSchemeUsed));
return originalStatus;
}
private Path getRubixPath(Path remotePath, boolean isRubixSchemeUsed)
{
String remotePathScheme = remotePath.toUri().getScheme();
if (remotePathScheme.equals(getScheme()) && isRubixSchemeUsed) {
return new Path(CacheConfig.RUBIX_SCHEME, remotePath.toUri().getAuthority(), remotePath.toUri().getPath());
}
return remotePath;
}
private URI getOriginalURI(URI actualURI)
{
String actualScheme = actualURI.getScheme();
if (!CacheConfig.RUBIX_SCHEME.equals(actualScheme)) {
return actualURI;
}
return URI.create(getScheme() + "://" + actualURI.getAuthority());
}
@Override
public RemoteIterator listLocatedStatus(Path path)
throws IOException
{
return new RemoteIterator()
{
private final RemoteIterator stats = fs.listLocatedStatus(path);
@Override
public boolean hasNext()
throws IOException
{
return stats.hasNext();
}
@Override
public LocatedFileStatus next()
throws IOException
{
LocatedFileStatus status = stats.next();
// use caching locations explicitly
BlockLocation[] locations = status.isFile() ? getFileBlockLocations(status, 0, status.getLen()) : null;
return new LocatedFileStatus(status, locations);
}
};
}
@Override
public BlockLocation[] getFileBlockLocations(FileStatus file, long start, long len) throws IOException
{
if (file == null) {
return null;
}
if ((CacheConfig.isEmbeddedModeEnabled(getConf()) && !bookKeeperFactory.isBookKeeperInitialized())
|| skipCache(file.getPath().toString(), getConf())) {
return fs.getFileBlockLocations(file, start, len);
}
List nodes = clusterManager.getNodes();
if (nodes == null) {
return fs.getFileBlockLocations(file, start, len);
}
else if (start >= 0L && len >= 0L) {
if (file.getLen() < start) {
return new BlockLocation[0];
}
else {
// Using similar logic of returning all Blocks as FileSystem.getFileBlockLocations does instead of only returning blocks from start till len
BlockLocation[] blockLocations = new BlockLocation[(int) Math.ceil((double) file.getLen() / splitSize)];
int blockNumber = 0;
for (long i = 0; i < file.getLen(); i = i + splitSize) {
long end = i + splitSize;
if (end > file.getLen()) {
end = file.getLen();
}
String key = file.getPath().toString() + i + end;
String nodeName = clusterManager.locateKey(key);
String[] name = new String[]{nodeName};
String[] host = new String[]{nodeName};
blockLocations[blockNumber++] = new BlockLocation(name, host, i, end - i);
log.debug(String.format("BlockLocation %s %d %d %s totalHosts: %s", file.getPath().toString(), i, end - i, host[0], nodes.size()));
}
return blockLocations;
}
}
else {
throw new IllegalArgumentException("Invalid start or len parameter");
}
}
}
