hadoop GenericEntityReader 源码
haddop GenericEntityReader 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-client/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/reader/GenericEntityReader.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.hadoop.yarn.server.timelineservice.storage.reader;
import java.io.IOException;
import java.util.EnumSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Query;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.filter.BinaryComparator;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.FamilyFilter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.PageFilter;
import org.apache.hadoop.hbase.filter.FilterList.Operator;
import org.apache.hadoop.hbase.filter.QualifierFilter;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineDataToRetrieve;
import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineEntityFilters;
import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderContext;
import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderUtils;
import org.apache.hadoop.yarn.server.timelineservice.reader.filter.TimelineFilterList;
import org.apache.hadoop.yarn.server.timelineservice.reader.filter.TimelineFilterUtils;
import org.apache.hadoop.yarn.server.timelineservice.storage.TimelineReader.Field;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.BaseTable;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.BaseTableRW;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.RowKeyPrefix;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.StringKeyConverter;
import org.apache.hadoop.yarn.server.timelineservice.storage.common.TimelineStorageUtils;
import org.apache.hadoop.yarn.server.timelineservice.storage.entity.EntityColumn;
import org.apache.hadoop.yarn.server.timelineservice.storage.entity.EntityColumnFamily;
import org.apache.hadoop.yarn.server.timelineservice.storage.entity.EntityColumnPrefix;
import org.apache.hadoop.yarn.server.timelineservice.storage.entity.EntityRowKey;
import org.apache.hadoop.yarn.server.timelineservice.storage.entity.EntityRowKeyPrefix;
import org.apache.hadoop.yarn.server.timelineservice.storage.entity.EntityTableRW;
import org.apache.hadoop.yarn.webapp.BadRequestException;
/**
* Timeline entity reader for generic entities that are stored in the entity
* table.
*/
class GenericEntityReader extends TimelineEntityReader {
private static final EntityTableRW ENTITY_TABLE = new EntityTableRW();
/**
* Used to convert strings key components to and from storage format.
*/
private final KeyConverter<String> stringKeyConverter =
new StringKeyConverter();
GenericEntityReader(TimelineReaderContext ctxt,
TimelineEntityFilters entityFilters, TimelineDataToRetrieve toRetrieve) {
super(ctxt, entityFilters, toRetrieve);
}
GenericEntityReader(TimelineReaderContext ctxt,
TimelineDataToRetrieve toRetrieve) {
super(ctxt, toRetrieve);
}
/**
* Uses the {@link EntityTableRW}.
*/
protected BaseTableRW<?> getTable() {
return ENTITY_TABLE;
}
@Override
protected FilterList constructFilterListBasedOnFilters() throws IOException {
// Filters here cannot be null for multiple entity reads as they are set in
// augmentParams if null.
FilterList listBasedOnFilters = new FilterList();
TimelineEntityFilters filters = getFilters();
// Create filter list based on created time range and add it to
// listBasedOnFilters.
long createdTimeBegin = filters.getCreatedTimeBegin();
long createdTimeEnd = filters.getCreatedTimeEnd();
if (createdTimeBegin != 0 || createdTimeEnd != Long.MAX_VALUE) {
listBasedOnFilters.addFilter(TimelineFilterUtils
.createSingleColValueFiltersByRange(EntityColumn.CREATED_TIME,
createdTimeBegin, createdTimeEnd));
}
// Create filter list based on metric filters and add it to
// listBasedOnFilters.
TimelineFilterList metricFilters = filters.getMetricFilters();
if (metricFilters != null && !metricFilters.getFilterList().isEmpty()) {
listBasedOnFilters.addFilter(TimelineFilterUtils.createHBaseFilterList(
EntityColumnPrefix.METRIC, metricFilters));
}
// Create filter list based on config filters and add it to
// listBasedOnFilters.
TimelineFilterList configFilters = filters.getConfigFilters();
if (configFilters != null && !configFilters.getFilterList().isEmpty()) {
listBasedOnFilters.addFilter(TimelineFilterUtils.createHBaseFilterList(
EntityColumnPrefix.CONFIG, configFilters));
}
// Create filter list based on info filters and add it to listBasedOnFilters
TimelineFilterList infoFilters = filters.getInfoFilters();
if (infoFilters != null && !infoFilters.getFilterList().isEmpty()) {
listBasedOnFilters.addFilter(TimelineFilterUtils.createHBaseFilterList(
EntityColumnPrefix.INFO, infoFilters));
}
return listBasedOnFilters;
}
/**
* Check if we need to fetch only some of the event columns.
*
* @return true if we need to fetch some of the columns, false otherwise.
*/
protected boolean fetchPartialEventCols(TimelineFilterList eventFilters,
EnumSet<Field> fieldsToRetrieve) {
return (eventFilters != null && !eventFilters.getFilterList().isEmpty() &&
!hasField(fieldsToRetrieve, Field.EVENTS));
}
/**
* Check if we need to fetch only some of the relates_to columns.
*
* @return true if we need to fetch some of the columns, false otherwise.
*/
protected boolean fetchPartialRelatesToCols(TimelineFilterList relatesTo,
EnumSet<Field> fieldsToRetrieve) {
return (relatesTo != null && !relatesTo.getFilterList().isEmpty() &&
!hasField(fieldsToRetrieve, Field.RELATES_TO));
}
/**
* Check if we need to fetch only some of the is_related_to columns.
*
* @return true if we need to fetch some of the columns, false otherwise.
*/
private boolean fetchPartialIsRelatedToCols(TimelineFilterList isRelatedTo,
EnumSet<Field> fieldsToRetrieve) {
return (isRelatedTo != null && !isRelatedTo.getFilterList().isEmpty() &&
!hasField(fieldsToRetrieve, Field.IS_RELATED_TO));
}
/**
* Check if we need to fetch only some of the columns based on event filters,
* relatesto and isrelatedto from info family.
*
* @return true, if we need to fetch only some of the columns, false if we
* need to fetch all the columns under info column family.
*/
protected boolean fetchPartialColsFromInfoFamily() {
EnumSet<Field> fieldsToRetrieve = getDataToRetrieve().getFieldsToRetrieve();
TimelineEntityFilters filters = getFilters();
return fetchPartialEventCols(filters.getEventFilters(), fieldsToRetrieve)
|| fetchPartialRelatesToCols(filters.getRelatesTo(), fieldsToRetrieve)
|| fetchPartialIsRelatedToCols(filters.getIsRelatedTo(),
fieldsToRetrieve);
}
/**
* Check if we need to create filter list based on fields. We need to create a
* filter list iff all fields need not be retrieved or we have some specific
* fields or metrics to retrieve. We also need to create a filter list if we
* have relationships(relatesTo/isRelatedTo) and event filters specified for
* the query.
*
* @return true if we need to create the filter list, false otherwise.
*/
protected boolean needCreateFilterListBasedOnFields() {
TimelineDataToRetrieve dataToRetrieve = getDataToRetrieve();
// Check if all fields are to be retrieved or not. If all fields have to
// be retrieved, also check if we have some metrics or configs to
// retrieve specified for the query because then a filter list will have
// to be created.
boolean flag =
!dataToRetrieve.getFieldsToRetrieve().contains(Field.ALL)
|| (dataToRetrieve.getConfsToRetrieve() != null && !dataToRetrieve
.getConfsToRetrieve().getFilterList().isEmpty())
|| (dataToRetrieve.getMetricsToRetrieve() != null && !dataToRetrieve
.getMetricsToRetrieve().getFilterList().isEmpty());
// Filters need to be checked only if we are reading multiple entities. If
// condition above is false, we check if there are relationships(relatesTo/
// isRelatedTo) and event filters specified for the query.
if (!flag && !isSingleEntityRead()) {
TimelineEntityFilters filters = getFilters();
flag =
(filters.getEventFilters() != null && !filters.getEventFilters()
.getFilterList().isEmpty())
|| (filters.getIsRelatedTo() != null && !filters.getIsRelatedTo()
.getFilterList().isEmpty())
|| (filters.getRelatesTo() != null && !filters.getRelatesTo()
.getFilterList().isEmpty());
}
return flag;
}
/**
* Add {@link QualifierFilter} filters to filter list for each column of
* entity table.
*
* @param list filter list to which qualifier filters have to be added.
*/
protected void updateFixedColumns(FilterList list) {
for (EntityColumn column : EntityColumn.values()) {
list.addFilter(new QualifierFilter(CompareOp.EQUAL, new BinaryComparator(
column.getColumnQualifierBytes())));
}
}
/**
* Creates a filter list which indicates that only some of the column
* qualifiers in the info column family will be returned in result.
*
* @param isApplication If true, it means operations are to be performed for
* application table, otherwise for entity table.
* @return filter list.
* @throws IOException if any problem occurs while creating filter list.
*/
private FilterList createFilterListForColsOfInfoFamily() throws IOException {
FilterList infoFamilyColsFilter = new FilterList(Operator.MUST_PASS_ONE);
// Add filters for each column in entity table.
updateFixedColumns(infoFamilyColsFilter);
EnumSet<Field> fieldsToRetrieve = getDataToRetrieve().getFieldsToRetrieve();
// If INFO field has to be retrieved, add a filter for fetching columns
// with INFO column prefix.
if (hasField(fieldsToRetrieve, Field.INFO)) {
infoFamilyColsFilter
.addFilter(TimelineFilterUtils.createHBaseQualifierFilter(
CompareOp.EQUAL, EntityColumnPrefix.INFO));
}
TimelineFilterList relatesTo = getFilters().getRelatesTo();
if (hasField(fieldsToRetrieve, Field.RELATES_TO)) {
// If RELATES_TO field has to be retrieved, add a filter for fetching
// columns with RELATES_TO column prefix.
infoFamilyColsFilter.addFilter(TimelineFilterUtils
.createHBaseQualifierFilter(CompareOp.EQUAL,
EntityColumnPrefix.RELATES_TO));
} else if (relatesTo != null && !relatesTo.getFilterList().isEmpty()) {
// Even if fields to retrieve does not contain RELATES_TO, we still
// need to have a filter to fetch some of the column qualifiers if
// relatesTo filters are specified. relatesTo filters will then be
// matched after fetching rows from HBase.
Set<String> relatesToCols =
TimelineFilterUtils.fetchColumnsFromFilterList(relatesTo);
infoFamilyColsFilter.addFilter(createFiltersFromColumnQualifiers(
EntityColumnPrefix.RELATES_TO, relatesToCols));
}
TimelineFilterList isRelatedTo = getFilters().getIsRelatedTo();
if (hasField(fieldsToRetrieve, Field.IS_RELATED_TO)) {
// If IS_RELATED_TO field has to be retrieved, add a filter for fetching
// columns with IS_RELATED_TO column prefix.
infoFamilyColsFilter.addFilter(TimelineFilterUtils
.createHBaseQualifierFilter(CompareOp.EQUAL,
EntityColumnPrefix.IS_RELATED_TO));
} else if (isRelatedTo != null && !isRelatedTo.getFilterList().isEmpty()) {
// Even if fields to retrieve does not contain IS_RELATED_TO, we still
// need to have a filter to fetch some of the column qualifiers if
// isRelatedTo filters are specified. isRelatedTo filters will then be
// matched after fetching rows from HBase.
Set<String> isRelatedToCols =
TimelineFilterUtils.fetchColumnsFromFilterList(isRelatedTo);
infoFamilyColsFilter.addFilter(createFiltersFromColumnQualifiers(
EntityColumnPrefix.IS_RELATED_TO, isRelatedToCols));
}
TimelineFilterList eventFilters = getFilters().getEventFilters();
if (hasField(fieldsToRetrieve, Field.EVENTS)) {
// If EVENTS field has to be retrieved, add a filter for fetching columns
// with EVENT column prefix.
infoFamilyColsFilter
.addFilter(TimelineFilterUtils.createHBaseQualifierFilter(
CompareOp.EQUAL, EntityColumnPrefix.EVENT));
} else if (eventFilters != null &&
!eventFilters.getFilterList().isEmpty()) {
// Even if fields to retrieve does not contain EVENTS, we still need to
// have a filter to fetch some of the column qualifiers on the basis of
// event filters specified. Event filters will then be matched after
// fetching rows from HBase.
Set<String> eventCols =
TimelineFilterUtils.fetchColumnsFromFilterList(eventFilters);
infoFamilyColsFilter.addFilter(createFiltersFromColumnQualifiers(
EntityColumnPrefix.EVENT, eventCols));
}
return infoFamilyColsFilter;
}
/**
* Exclude column prefixes via filters which are not required(based on fields
* to retrieve) from info column family. These filters are added to filter
* list which contains a filter for getting info column family.
*
* @param infoColFamilyList filter list for info column family.
*/
private void excludeFieldsFromInfoColFamily(FilterList infoColFamilyList) {
EnumSet<Field> fieldsToRetrieve = getDataToRetrieve().getFieldsToRetrieve();
// Events not required.
if (!hasField(fieldsToRetrieve, Field.EVENTS)) {
infoColFamilyList.addFilter(TimelineFilterUtils
.createHBaseQualifierFilter(CompareOp.NOT_EQUAL,
EntityColumnPrefix.EVENT));
}
// info not required.
if (!hasField(fieldsToRetrieve, Field.INFO)) {
infoColFamilyList.addFilter(TimelineFilterUtils
.createHBaseQualifierFilter(CompareOp.NOT_EQUAL,
EntityColumnPrefix.INFO));
}
// is related to not required.
if (!hasField(fieldsToRetrieve, Field.IS_RELATED_TO)) {
infoColFamilyList.addFilter(TimelineFilterUtils
.createHBaseQualifierFilter(CompareOp.NOT_EQUAL,
EntityColumnPrefix.IS_RELATED_TO));
}
// relates to not required.
if (!hasField(fieldsToRetrieve, Field.RELATES_TO)) {
infoColFamilyList.addFilter(TimelineFilterUtils
.createHBaseQualifierFilter(CompareOp.NOT_EQUAL,
EntityColumnPrefix.RELATES_TO));
}
}
/**
* Updates filter list based on fields for confs and metrics to retrieve.
*
* @param listBasedOnFields filter list based on fields.
* @throws IOException if any problem occurs while updating filter list.
*/
private void updateFilterForConfsAndMetricsToRetrieve(
FilterList listBasedOnFields, Set<String> cfsInFields)
throws IOException {
TimelineDataToRetrieve dataToRetrieve = getDataToRetrieve();
// Please note that if confsToRetrieve is specified, we would have added
// CONFS to fields to retrieve in augmentParams() even if not specified.
if (dataToRetrieve.getFieldsToRetrieve().contains(Field.CONFIGS)) {
// Create a filter list for configs.
listBasedOnFields.addFilter(TimelineFilterUtils
.createFilterForConfsOrMetricsToRetrieve(
dataToRetrieve.getConfsToRetrieve(), EntityColumnFamily.CONFIGS,
EntityColumnPrefix.CONFIG));
cfsInFields.add(Bytes.toString(EntityColumnFamily.CONFIGS.getBytes()));
}
// Please note that if metricsToRetrieve is specified, we would have added
// METRICS to fields to retrieve in augmentParams() even if not specified.
if (dataToRetrieve.getFieldsToRetrieve().contains(Field.METRICS)) {
// Create a filter list for metrics.
listBasedOnFields.addFilter(TimelineFilterUtils
.createFilterForConfsOrMetricsToRetrieve(
dataToRetrieve.getMetricsToRetrieve(),
EntityColumnFamily.METRICS, EntityColumnPrefix.METRIC));
cfsInFields.add(Bytes.toString(EntityColumnFamily.METRICS.getBytes()));
}
}
@Override
protected FilterList constructFilterListBasedOnFields(Set<String> cfsInFields)
throws IOException {
if (!needCreateFilterListBasedOnFields()) {
// Fetch all the columns. No need of a filter.
return null;
}
FilterList listBasedOnFields = new FilterList(Operator.MUST_PASS_ONE);
FilterList infoColFamilyList = new FilterList();
// By default fetch everything in INFO column family.
FamilyFilter infoColumnFamily =
new FamilyFilter(CompareOp.EQUAL, new BinaryComparator(
EntityColumnFamily.INFO.getBytes()));
infoColFamilyList.addFilter(infoColumnFamily);
if (!isSingleEntityRead() && fetchPartialColsFromInfoFamily()) {
// We can fetch only some of the columns from info family.
infoColFamilyList.addFilter(createFilterListForColsOfInfoFamily());
} else {
// Exclude column prefixes in info column family which are not required
// based on fields to retrieve.
excludeFieldsFromInfoColFamily(infoColFamilyList);
}
listBasedOnFields.addFilter(infoColFamilyList);
cfsInFields.add(Bytes.toString(EntityColumnFamily.INFO.getBytes()));
updateFilterForConfsAndMetricsToRetrieve(listBasedOnFields, cfsInFields);
return listBasedOnFields;
}
@Override
protected void validateParams() {
if (getContext() == null) {
throw new NullPointerException("context shouldn't be null");
}
if (getDataToRetrieve() == null) {
throw new NullPointerException("data to retrieve shouldn't be null");
}
if (getContext().getClusterId() == null) {
throw new NullPointerException("clusterId shouldn't be null");
}
if (getContext().getAppId() == null) {
throw new NullPointerException("appId shouldn't be null");
}
if (getContext().getEntityType() == null) {
throw new NullPointerException("entityType shouldn't be null");
}
if (isSingleEntityRead()) {
if (getContext().getEntityId() == null) {
throw new NullPointerException("entityId shouldn't be null");
}
}
}
@Override
protected void augmentParams(Configuration hbaseConf, Connection conn)
throws IOException {
defaultAugmentParams(hbaseConf, conn);
// Add configs/metrics to fields to retrieve if confsToRetrieve and/or
// metricsToRetrieve are specified.
getDataToRetrieve().addFieldsBasedOnConfsAndMetricsToRetrieve();
if (!isSingleEntityRead()) {
createFiltersIfNull();
}
}
@Override
protected Result getResult(Configuration hbaseConf, Connection conn,
FilterList filterList) throws IOException {
TimelineReaderContext context = getContext();
Result result = null;
if (context.getEntityIdPrefix() != null) {
byte[] rowKey = new EntityRowKey(context.getClusterId(),
context.getUserId(), context.getFlowName(), context.getFlowRunId(),
context.getAppId(), context.getEntityType(),
context.getEntityIdPrefix(), context.getEntityId()).getRowKey();
Get get = new Get(rowKey);
setMetricsTimeRange(get);
get.setMaxVersions(getDataToRetrieve().getMetricsLimit());
if (filterList != null && !filterList.getFilters().isEmpty()) {
get.setFilter(filterList);
}
result = getTable().getResult(hbaseConf, conn, get);
} else {
// Prepare for range scan
// create single SingleColumnValueFilter and add to existing filters.
FilterList filter = new FilterList(Operator.MUST_PASS_ALL);
if (filterList != null && !filterList.getFilters().isEmpty()) {
filter.addFilter(filterList);
}
FilterList newFilter = new FilterList();
newFilter.addFilter(TimelineFilterUtils.createHBaseSingleColValueFilter(
EntityColumn.ID, context.getEntityId(), CompareOp.EQUAL));
newFilter.addFilter(new PageFilter(1));
filter.addFilter(newFilter);
ResultScanner results = getResults(hbaseConf, conn, filter);
try {
Iterator<Result> iterator = results.iterator();
if (iterator.hasNext()) {
result = iterator.next();
}
} finally {
results.close();
}
}
return result;
}
private void setMetricsTimeRange(Query query) {
// Set time range for metric values.
HBaseTimelineStorageUtils.setMetricsTimeRange(
query, EntityColumnFamily.METRICS.getBytes(),
getDataToRetrieve().getMetricsTimeBegin(),
getDataToRetrieve().getMetricsTimeEnd());
}
@Override
protected ResultScanner getResults(Configuration hbaseConf, Connection conn,
FilterList filterList) throws IOException {
// Scan through part of the table to find the entities belong to one app
// and one type
Scan scan = new Scan();
TimelineReaderContext context = getContext();
RowKeyPrefix<EntityRowKey> entityRowKeyPrefix = null;
// default mode, will always scans from beginning of entity type.
if (getFilters() == null || getFilters().getFromId() == null) {
entityRowKeyPrefix = new EntityRowKeyPrefix(context.getClusterId(),
context.getUserId(), context.getFlowName(), context.getFlowRunId(),
context.getAppId(), context.getEntityType(), null, null);
scan.setRowPrefixFilter(entityRowKeyPrefix.getRowKeyPrefix());
} else { // pagination mode, will scan from given entityIdPrefix!enitityId
EntityRowKey entityRowKey = null;
try {
entityRowKey =
EntityRowKey.parseRowKeyFromString(getFilters().getFromId());
} catch (IllegalArgumentException e) {
throw new BadRequestException("Invalid filter fromid is provided.");
}
if (!context.getClusterId().equals(entityRowKey.getClusterId())) {
throw new BadRequestException(
"fromid doesn't belong to clusterId=" + context.getClusterId());
}
// set start row
scan.withStartRow(entityRowKey.getRowKey());
// get the bytes for stop row
entityRowKeyPrefix = new EntityRowKeyPrefix(context.getClusterId(),
context.getUserId(), context.getFlowName(), context.getFlowRunId(),
context.getAppId(), context.getEntityType(), null, null);
// set stop row
scan.withStopRow(
HBaseTimelineStorageUtils.calculateTheClosestNextRowKeyForPrefix(
entityRowKeyPrefix.getRowKeyPrefix()));
// set page filter to limit. This filter has to set only in pagination
// mode.
filterList.addFilter(new PageFilter(getFilters().getLimit()));
}
setMetricsTimeRange(scan);
scan.setMaxVersions(getDataToRetrieve().getMetricsLimit());
if (filterList != null && !filterList.getFilters().isEmpty()) {
scan.setFilter(filterList);
}
return getTable().getResultScanner(hbaseConf, conn, scan);
}
@Override
protected TimelineEntity parseEntity(Result result) throws IOException {
if (result == null || result.isEmpty()) {
return null;
}
TimelineEntity entity = new TimelineEntity();
EntityRowKey parseRowKey = EntityRowKey.parseRowKey(result.getRow());
entity.setType(parseRowKey.getEntityType());
entity.setId(parseRowKey.getEntityId());
entity.setIdPrefix(parseRowKey.getEntityIdPrefix().longValue());
TimelineEntityFilters filters = getFilters();
// fetch created time
Long createdTime = (Long) ColumnRWHelper.readResult(result,
EntityColumn.CREATED_TIME);
entity.setCreatedTime(createdTime);
EnumSet<Field> fieldsToRetrieve = getDataToRetrieve().getFieldsToRetrieve();
// fetch is related to entities and match isRelatedTo filter. If isRelatedTo
// filters do not match, entity would be dropped. We have to match filters
// locally as relevant HBase filters to filter out rows on the basis of
// isRelatedTo are not set in HBase scan.
boolean checkIsRelatedTo =
!isSingleEntityRead() && filters.getIsRelatedTo() != null
&& filters.getIsRelatedTo().getFilterList().size() > 0;
if (hasField(fieldsToRetrieve, Field.IS_RELATED_TO) || checkIsRelatedTo) {
readRelationship(entity, result, EntityColumnPrefix.IS_RELATED_TO, true);
if (checkIsRelatedTo
&& !TimelineStorageUtils.matchIsRelatedTo(entity,
filters.getIsRelatedTo())) {
return null;
}
if (!hasField(fieldsToRetrieve, Field.IS_RELATED_TO)) {
entity.getIsRelatedToEntities().clear();
}
}
// fetch relates to entities and match relatesTo filter. If relatesTo
// filters do not match, entity would be dropped. We have to match filters
// locally as relevant HBase filters to filter out rows on the basis of
// relatesTo are not set in HBase scan.
boolean checkRelatesTo =
!isSingleEntityRead() && filters.getRelatesTo() != null
&& filters.getRelatesTo().getFilterList().size() > 0;
if (hasField(fieldsToRetrieve, Field.RELATES_TO)
|| checkRelatesTo) {
readRelationship(entity, result, EntityColumnPrefix.RELATES_TO, false);
if (checkRelatesTo
&& !TimelineStorageUtils.matchRelatesTo(entity,
filters.getRelatesTo())) {
return null;
}
if (!hasField(fieldsToRetrieve, Field.RELATES_TO)) {
entity.getRelatesToEntities().clear();
}
}
// fetch info if fieldsToRetrieve contains INFO or ALL.
if (hasField(fieldsToRetrieve, Field.INFO)) {
readKeyValuePairs(entity, result, EntityColumnPrefix.INFO, false);
}
// fetch configs if fieldsToRetrieve contains CONFIGS or ALL.
if (hasField(fieldsToRetrieve, Field.CONFIGS)) {
readKeyValuePairs(entity, result, EntityColumnPrefix.CONFIG, true);
}
// fetch events and match event filters if they exist. If event filters do
// not match, entity would be dropped. We have to match filters locally
// as relevant HBase filters to filter out rows on the basis of events
// are not set in HBase scan.
boolean checkEvents =
!isSingleEntityRead() && filters.getEventFilters() != null
&& filters.getEventFilters().getFilterList().size() > 0;
if (hasField(fieldsToRetrieve, Field.EVENTS) || checkEvents) {
readEvents(entity, result, EntityColumnPrefix.EVENT);
if (checkEvents
&& !TimelineStorageUtils.matchEventFilters(entity,
filters.getEventFilters())) {
return null;
}
if (!hasField(fieldsToRetrieve, Field.EVENTS)) {
entity.getEvents().clear();
}
}
// fetch metrics if fieldsToRetrieve contains METRICS or ALL.
if (hasField(fieldsToRetrieve, Field.METRICS)) {
readMetrics(entity, result, EntityColumnPrefix.METRIC);
}
entity.getInfo().put(TimelineReaderUtils.FROMID_KEY,
parseRowKey.getRowKeyAsString());
return entity;
}
/**
* Helper method for reading key-value pairs for either info or config.
*
* @param <T> Describes the type of column prefix.
* @param entity entity to fill.
* @param result result from HBase.
* @param prefix column prefix.
* @param isConfig if true, means we are reading configs, otherwise info.
* @throws IOException if any problem is encountered while reading result.
*/
protected <T extends BaseTable<T>> void readKeyValuePairs(
TimelineEntity entity, Result result,
ColumnPrefix<T> prefix, boolean isConfig) throws IOException {
// info and configuration are of type Map<String, Object or String>
Map<String, Object> columns =
ColumnRWHelper.readResults(result, prefix, stringKeyConverter);
if (isConfig) {
for (Map.Entry<String, Object> column : columns.entrySet()) {
entity.addConfig(column.getKey(), column.getValue().toString());
}
} else {
entity.addInfo(columns);
}
}
}
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