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com.marklogic.mapreduce.ContentWriter Maven / Gradle / Ivy
/*
* Copyright 2003-2019 MarkLogic Corporation
*
* 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.marklogic.mapreduce;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.GZIPInputStream;
import java.util.zip.ZipInputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Counter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import com.marklogic.mapreduce.utilities.AssignmentManager;
import com.marklogic.mapreduce.utilities.AssignmentPolicy;
import com.marklogic.mapreduce.utilities.ForestHost;
import com.marklogic.mapreduce.utilities.InternalUtilities;
import com.marklogic.mapreduce.utilities.StatisticalAssignmentPolicy;
import com.marklogic.xcc.Content;
import com.marklogic.xcc.ContentCapability;
import com.marklogic.xcc.ContentCreateOptions;
import com.marklogic.xcc.ContentFactory;
import com.marklogic.xcc.ContentPermission;
import com.marklogic.xcc.ContentSource;
import com.marklogic.xcc.DocumentFormat;
import com.marklogic.xcc.DocumentRepairLevel;
import com.marklogic.xcc.RequestOptions;
import com.marklogic.xcc.Session;
import com.marklogic.xcc.impl.SessionImpl;
import com.marklogic.xcc.Session.TransactionMode;
import com.marklogic.xcc.exceptions.ContentInsertException;
import com.marklogic.xcc.exceptions.QueryException;
import com.marklogic.xcc.exceptions.RequestException;
import com.marklogic.xcc.exceptions.RequestServerException;
import com.marklogic.xcc.exceptions.RetryableQueryException;
/**
* MarkLogicRecordWriter that inserts content to MarkLogicServer.
*
* @author jchen
*
*/
public class ContentWriter
extends MarkLogicRecordWriter
implements MarkLogicConstants {
public static final Log LOG = LogFactory.getLog(ContentWriter.class);
public static final String ID_PREFIX = "#";
/**
* Directory of the output documents.
*/
protected String outputDir;
/**
* Content options of the output documents.
*/
protected ContentCreateOptions options;
/**
* A map from a host to a ContentSource.
*/
protected Map hostSourceMap;
/**
* Content lists for each forest.
*/
protected Content[][] forestContents;
/**
* An array of forest/host ids
*/
protected String[] forestIds;
/**
* An array of current replica
*/
protected int[] curReplica;
/**
* An array of blacklist host
*/
protected boolean[] blacklist;
/**
* Counts of documents per forest.
*/
protected int[] counts;
/**
* URIs of the documents in a batch.
*/
protected HashMap[] pendingUris;
/**
* URIs of the documents to be committed.
*/
protected List[] commitUris;
/**
* Whether in fast load mode.
*/
protected boolean fastLoad;
/**
* Batch size.
*/
protected int batchSize;
/**
* Counts of requests per forest.
*/
protected int[] stmtCounts;
/**
* Sessions per forest.
*/
protected Session[] sessions;
private boolean formatNeeded;
private FileSystem fs;
protected InputStream is;
private boolean streaming;
private RequestOptions requestOptions;
protected AssignmentManager am;
//fIdx cached for statistical policy
protected int sfId;
protected boolean countBased;
/** role-id -> role-name mapping **/
protected LinkedMapWritable roleMap;
protected HashMap permsMap;
protected int succeeded = 0;
protected int failed = 0;
protected boolean needCommit = false;
protected int hostId = 0;
protected boolean isCopyColls;
protected boolean isCopyQuality;
protected boolean isCopyMeta;
protected long effectiveVersion;
protected boolean isTxnCompatible = false;
/**
* for failover retry
*/
protected int retry;
protected final int maxRetries = 15;
protected int sleepTime;
protected final int maxSleepTime = 30000;
public ContentWriter(Configuration conf,
Map hostSourceMap, boolean fastLoad) {
this(conf, hostSourceMap, fastLoad, null);
}
public ContentWriter(Configuration conf,
Map hostSourceMap, boolean fastLoad,
AssignmentManager am) {
super(conf, null);
effectiveVersion = am.getEffectiveVersion();
isTxnCompatible = effectiveVersion == 0;
this.fastLoad = fastLoad;
this.hostSourceMap = hostSourceMap;
this.am = am;
requestOptions = new RequestOptions();
requestOptions.setMaxAutoRetry(0);
permsMap = new HashMap();
// key order in key set is guaranteed by LinkedHashMap,
// i.e., the order keys are inserted
int srcMapSize;
if (fastLoad) {
forestIds = am.getMasterIds().clone();
srcMapSize = forestIds.length;
curReplica = new int[srcMapSize];
for (int i = 0; i < srcMapSize; i++) {
curReplica[i] = 0;
}
} else {
srcMapSize = hostSourceMap.size();
forestIds = new String[srcMapSize];
forestIds = hostSourceMap.keySet().toArray(forestIds);
blacklist = new boolean[srcMapSize];
for (int i = 0; i < srcMapSize; i++) {
blacklist[i] = false;
}
}
hostId = (int)(Math.random() * srcMapSize);
// arraySize is the number of forests in fast load mode; 1 otherwise.
int arraySize = fastLoad ? srcMapSize : 1;
sessions = new Session[arraySize];
stmtCounts = new int[arraySize];
outputDir = conf.get(OUTPUT_DIRECTORY);
batchSize = conf.getInt(BATCH_SIZE, DEFAULT_BATCH_SIZE);
pendingUris = new HashMap[arraySize];
for (int i = 0; i < arraySize; i++) {
pendingUris[i] = new HashMap();
}
if (fastLoad
&& (am.getPolicy().getPolicyKind() == AssignmentPolicy.Kind.STATISTICAL
|| am.getPolicy().getPolicyKind() == AssignmentPolicy.Kind.RANGE
|| am.getPolicy().getPolicyKind() == AssignmentPolicy.Kind.QUERY)) {
countBased = true;
forestContents = new Content[1][batchSize];
counts = new int[1];
sfId = -1;
} else {
forestContents = new Content[arraySize][batchSize];
counts = new int[arraySize];
sfId = 0;
}
String[] perms = conf.getStrings(OUTPUT_PERMISSION);
List permissions = null;
if (perms != null && perms.length > 0) {
int i = 0;
while (i + 1 < perms.length) {
String roleName = perms[i++];
if (roleName == null || roleName.isEmpty()) {
LOG.error("Illegal role name: " + roleName);
continue;
}
String perm = perms[i].trim();
ContentCapability capability = null;
if (perm.equalsIgnoreCase(ContentCapability.READ.toString())) {
capability = ContentCapability.READ;
} else if (perm.equalsIgnoreCase(ContentCapability.EXECUTE.toString())) {
capability = ContentCapability.EXECUTE;
} else if (perm.equalsIgnoreCase(ContentCapability.INSERT.toString())) {
capability = ContentCapability.INSERT;
} else if (perm.equalsIgnoreCase(ContentCapability.UPDATE.toString())) {
capability = ContentCapability.UPDATE;
} else if (perm.equalsIgnoreCase(ContentCapability.NODE_UPDATE.toString())) {
capability = ContentCapability.NODE_UPDATE;
} else {
LOG.error("Illegal permission: " + perm);
}
if (capability != null) {
if (permissions == null) {
permissions = new ArrayList();
}
permissions.add(new ContentPermission(capability, roleName));
}
i++;
}
}
options = new ContentCreateOptions();
String[] collections = conf.getStrings(OUTPUT_COLLECTION);
if (collections != null) {
for (int i = 0; i < collections.length; i++) {
collections[i] = collections[i].trim();
}
options.setCollections(collections);
}
options.setQuality(conf.getInt(OUTPUT_QUALITY, 0));
if (permissions != null) {
options.setPermissions(permissions.toArray(
new ContentPermission[permissions.size()]));
}
String contentTypeStr = conf.get(CONTENT_TYPE, DEFAULT_CONTENT_TYPE);
ContentType contentType = ContentType.valueOf(contentTypeStr);
if (contentType == ContentType.UNKNOWN) {
formatNeeded = true;
} else {
options.setFormat(contentType.getDocumentFormat());
}
options.setLanguage(conf.get(OUTPUT_CONTENT_LANGUAGE));
String repairLevel = conf.get(OUTPUT_XML_REPAIR_LEVEL,
DEFAULT_OUTPUT_XML_REPAIR_LEVEL).toLowerCase();
options.setNamespace(conf.get(OUTPUT_CONTENT_NAMESPACE));
if (DocumentRepairLevel.DEFAULT.toString().equals(repairLevel)){
options.setRepairLevel(DocumentRepairLevel.DEFAULT);
}
else if (DocumentRepairLevel.NONE.toString().equals(repairLevel)){
options.setRepairLevel(DocumentRepairLevel.NONE);
}
else if (DocumentRepairLevel.FULL.toString().equals(repairLevel)){
options.setRepairLevel(DocumentRepairLevel.FULL);
}
streaming = conf.getBoolean(OUTPUT_STREAMING, false);
String encoding = conf.get(OUTPUT_CONTENT_ENCODING);
if (encoding != null) {
options.setEncoding(encoding);
}
options.setTemporalCollection(conf.get(TEMPORAL_COLLECTION));
needCommit = needCommit();
if (needCommit) {
commitUris = new ArrayList[arraySize];
for (int i = 0; i < arraySize; i++) {
commitUris[i] = new ArrayList(txnSize*batchSize);
}
}
isCopyColls = conf.getBoolean(COPY_COLLECTIONS, true);
isCopyQuality = conf.getBoolean(COPY_QUALITY, true);
isCopyMeta = conf.getBoolean(COPY_METADATA, true);
}
protected boolean needCommit() {
return true;
}
protected Content createContent(DocumentURI key, VALUEOUT value)
throws IOException {
String uri = key.getUri();
Content content = null;
if (value instanceof Text) {
if (formatNeeded) {
options.setFormat(DocumentFormat.TEXT);
formatNeeded = false;
}
options.setEncoding(DEFAULT_OUTPUT_CONTENT_ENCODING);
content = ContentFactory.newContent(uri,
((Text) value).getBytes(), 0,
((Text)value).getLength(), options);
} else if (value instanceof MarkLogicNode) {
if (formatNeeded) {
options.setFormat(DocumentFormat.XML);
formatNeeded = false;
}
content = ContentFactory.newContent(uri,
((MarkLogicNode)value).get(), options);
} else if (value instanceof ForestDocument) {
ContentCreateOptions newOptions = options;
if (isCopyColls || isCopyMeta || isCopyQuality) {
newOptions = (ContentCreateOptions)options.clone();
}
content = ((ForestDocument)value).createContent(uri, newOptions,
isCopyColls, isCopyMeta, isCopyQuality);
} else if (value instanceof BytesWritable) {
if (formatNeeded) {
options.setFormat(DocumentFormat.BINARY);
formatNeeded = false;
}
content = ContentFactory.newContent(uri,
((BytesWritable) value).getBytes(), 0,
((BytesWritable) value).getLength(), options);
} else if (value instanceof CustomContent) {
ContentCreateOptions newOptions = options;
newOptions = (ContentCreateOptions)options.clone();
content = ((CustomContent) value).getContent(conf, newOptions,
uri);
} else if (value instanceof DatabaseDocument) {
DatabaseDocument doc = (DatabaseDocument)value;
if (formatNeeded) {
options.setFormat(doc.getContentType().getDocumentFormat());
formatNeeded = false;
}
options.setEncoding(DEFAULT_OUTPUT_CONTENT_ENCODING);
if (doc.getContentType() == ContentType.BINARY) {
content = ContentFactory.newContent(uri,
doc.getContentAsByteArray(), options);
} else {
content = ContentFactory.newContent(uri,
doc.getContentAsText().getBytes(), options);
}
} else if (value instanceof StreamLocator) {
Path path = ((StreamLocator)value).getPath();
if (fs == null) {
URI fileUri = path.toUri();
fs = FileSystem.get(fileUri, conf);
}
switch (((StreamLocator)value).getCodec()) {
case GZIP:
InputStream fileIn = fs.open(path);
is = new GZIPInputStream(fileIn);
break;
case ZIP:
if (is == null) {
InputStream zipfileIn = fs.open(path);
ZipInputStream zis = new ZipInputStream(zipfileIn);
is = new ZipEntryInputStream(zis, path.toString());
}
break;
case NONE:
is = fs.open(path);
break;
default:
LOG.error("Unsupported compression codec: " +
((StreamLocator)value).getCodec() + " for document " +
key);
return content;
}
if (streaming) {
content = ContentFactory.newUnBufferedContent(uri, is,
options);
} else {
content = ContentFactory.newContent(uri, is, options);
}
} else {
throw new UnsupportedOperationException(value.getClass()
+ " is not supported.");
}
return content;
}
/**
* Insert batch, log errors and update stats.
*
* @param batch batch of content to insert
* @param id forest Id
*/
protected void insertBatch(Content[] batch, int id)
throws IOException {
retry = 0;
sleepTime = 500;
while (retry < maxRetries) {
try {
if (retry == 1) {
LOG.info("Retrying document insert");
}
List errors =
sessions[id].insertContentCollectErrors(batch);
if (errors != null) {
for (RequestException ex : errors) {
Throwable cause = ex.getCause();
if (cause != null) {
if (cause instanceof QueryException) {
LOG.error(
((QueryException)cause).getFormatString());
} else {
LOG.error(cause.getMessage());
}
}
if (ex instanceof ContentInsertException) {
Content content =
((ContentInsertException)ex).getContent();
DocumentURI failedUri =
pendingUris[id].remove(content);
failed++;
if (failedUri != null) {
LOG.warn("Failed document " + failedUri);
}
}
}
}
if (retry > 0) {
LOG.debug("Retry successful");
}
} catch (Exception e) {
boolean retryable = true;
if (e instanceof QueryException) {
LOG.error("QueryException:" + ((QueryException)e).getFormatString());
retryable = ((QueryException)e).isRetryable();
} else if (e instanceof RequestServerException) {
// log error and continue on RequestServerException
// not retryable so trying to connect to the replica
LOG.error("RequestServerException:" + e.getMessage());
} else {
LOG.error("Exception:" + e.getMessage());
}
// necessary to roll back in certain scenarios.
if (needCommit) {
rollback(id);
}
if (retryable && ++retry < maxRetries) {
// necessary to close the session too.
sessions[id].close();
try {
InternalUtilities.sleep(sleepTime);
} catch (Exception e2) {
}
sleepTime = sleepTime * 2;
if (sleepTime > maxSleepTime)
sleepTime = maxSleepTime;
// We need to switch host even for RetryableQueryException
// because it could be "sync replicating" (bug:45785)
sessions[id] = getSession(id, true);
continue;
} else if (retryable) {
LOG.info("Exceeded max retry");
}
failed += batch.length;
// remove the failed content from pendingUris
for (Content fc : batch) {
DocumentURI failedUri = pendingUris[id].remove(fc);
LOG.warn("Failed document " + failedUri);
}
throw new IOException(e);
}
break;
}
if (needCommit) {
// move uris from pending to commit
for (DocumentURI uri : pendingUris[id].values()) {
commitUris[id].add(uri);
}
} else {
succeeded += pendingUris[id].size();
}
pendingUris[id].clear();
}
protected void rollback(int id) throws IOException {
try {
sessions[id].rollback();
} catch (Exception e) {
LOG.error("Error rolling back transaction " + e.getMessage());
if (LOG.isDebugEnabled()) {
LOG.debug(e);
}
} finally {
if (countBased) {
rollbackCount(id);
}
failed += commitUris[id].size();
for (DocumentURI failedUri : commitUris[id]) {
LOG.warn("Failed document: " + failedUri);
}
commitUris[id].clear();
}
}
protected void commit(int id) throws IOException {
try {
sessions[id].commit();
succeeded += commitUris[id].size();
commitUris[id].clear();
} catch (Exception e) {
LOG.error("Error commiting transaction " + e.getMessage());
rollback(id);
sessions[id].close();
sessions[id] = null;
}
}
@Override
public void write(DocumentURI key, VALUEOUT value)
throws IOException, InterruptedException {
InternalUtilities.getUriWithOutputDir(key, outputDir);
int fId = 0;
if (fastLoad) {
if(!countBased) {
// placement for legacy or bucket
fId = am.getPlacementForestIndex(key);
sfId = fId;
} else {
if (sfId == -1) {
sfId = am.getPlacementForestIndex(key);
}
fId = sfId;
}
}
int sid = fId;
Content content = createContent(key,value);
if (content == null) {
failed++;
return;
}
if (countBased) {
fId = 0;
}
pendingUris[sid].put(content, (DocumentURI)key.clone());
boolean inserted = false;
forestContents[fId][counts[fId]++] = content;
if (counts[fId] == batchSize) {
if (sessions[sid] == null) {
sessions[sid] = getSession(sid, false);
}
insertBatch(forestContents[fId], sid);
stmtCounts[sid]++;
//reset forest index for statistical
if (countBased) {
sfId = -1;
}
counts[fId] = 0;
inserted = true;
}
boolean committed = false;
if (needCommit && stmtCounts[sid] == txnSize) {
commit(sid);
stmtCounts[sid] = 0;
committed = true;
}
if ((!fastLoad) && ((inserted && (!needCommit)) || committed)) {
// rotate to next host and reset session
int oldHostId = hostId;
for (;;) {
hostId = (hostId + 1)%forestIds.length;
if (!blacklist[hostId]) {
break;
}
if (hostId == oldHostId) {
for (int i = 0; i < blacklist.length; i++) {
blacklist[i] = false;
}
}
}
sessions[0] = null;
}
}
protected void rollbackCount(int fId) {
((StatisticalAssignmentPolicy)am.getPolicy()).updateStats(fId,
-batchSize);
}
protected Session getSession(int fId, boolean nextReplica, TransactionMode mode) {
Session session = null;
if (fastLoad) {
List replicas = am.getReplicas(forestIds[fId]);
if (nextReplica) {
curReplica[fId] = (curReplica[fId] + 1)%replicas.size();
}
ContentSource cs = hostSourceMap.get(replicas.get(curReplica[fId]).getHostName());
String forestId = replicas.get(curReplica[fId]).getForest();
session = cs.newSession(ID_PREFIX + forestId);
if (LOG.isDebugEnabled()) {
LOG.debug("Connect to forest " + forestId + " on "
+ session.getConnectionUri().getHost());
}
} else {
if (nextReplica) {
blacklist[hostId] = true;
int oldHostId = hostId;
for (;;) {
hostId = (hostId + 1)%forestIds.length;
if (!blacklist[hostId])
break;
if (hostId == oldHostId) {
for (int i = 0; i < blacklist.length; i++) {
blacklist[i] = false;
}
}
}
}
String forestId = forestIds[hostId];
ContentSource cs = hostSourceMap.get(forestId);
session = cs.newSession();
if (LOG.isDebugEnabled()) {
LOG.debug("Connect to " + session.getConnectionUri().getHost());
}
}
session.setTransactionMode(mode);
session.setDefaultRequestOptions(requestOptions);
((SessionImpl)session).setCompatibleMode(isTxnCompatible);
return session;
}
protected Session getSession(int fId, boolean nextReplica) {
TransactionMode mode = TransactionMode.AUTO;
if (needCommit) {
mode = TransactionMode.UPDATE;
}
return getSession(fId, nextReplica, mode);
}
@Override
public void close(TaskAttemptContext context) throws IOException,
InterruptedException {
if (batchSize > 1) {
int len, sid;
if (countBased) {
len = 1;
sid = sfId;
} else {
len = fastLoad ? forestIds.length : 1;
sid = 0;
}
for (int i = 0; i < len; i++, sid++) {
if (sid != -1 && pendingUris[sid].size() > 0) {
Content[] remainder = new Content[counts[i]];
System.arraycopy(forestContents[i], 0, remainder, 0,
counts[i]);
if (sessions[sid] == null) {
sessions[sid] = getSession(sid, false);
}
try {
insertBatch(remainder, sid);
} catch (Throwable e) {
LOG.error("Error caught inserting documents: ", e);
}
stmtCounts[sid]++;
}
}
}
for (int i = 0; i < sessions.length; i++) {
if (sessions[i] != null) {
if (stmtCounts[i] > 0 && needCommit) {
try {
commit(i);
if (sessions[i] != null) {
sessions[i].close();
}
} catch (Throwable e) {
LOG.error("Error committing transaction: ", e);
}
} else {
sessions[i].close();
}
}
}
if (is != null) {
is.close();
if (is instanceof ZipEntryInputStream) {
((ZipEntryInputStream)is).closeZipInputStream();
}
}
context.getCounter(MarkLogicCounter.OUTPUT_RECORDS_COMMITTED)
.increment(succeeded);
context.getCounter(MarkLogicCounter.OUTPUT_RECORDS_FAILED)
.increment(failed);
}
@Override
public int getTransactionSize(Configuration conf) {
// return the specified txn size
if (conf.get(TXN_SIZE) != null) {
int txnSize = conf.getInt(TXN_SIZE, 0);
return txnSize <= 0 ? 1 : txnSize;
}
return 1000 / conf.getInt(BATCH_SIZE, DEFAULT_BATCH_SIZE);
}
}
