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GetDataStreamsTransportAction.java
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GetDataStreamsTransportAction.java
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.datastreams.action;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.datastreams.DataStreamsActionUtil;
import org.elasticsearch.action.datastreams.GetDataStreamAction;
import org.elasticsearch.action.datastreams.GetDataStreamAction.Response.IndexProperties;
import org.elasticsearch.action.datastreams.GetDataStreamAction.Response.ManagedBy;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeReadAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.health.ClusterStateHealth;
import org.elasticsearch.cluster.metadata.DataStream;
import org.elasticsearch.cluster.metadata.DataStreamGlobalRetentionResolver;
import org.elasticsearch.cluster.metadata.DataStreamLifecycle;
import org.elasticsearch.cluster.metadata.IndexMetadata;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.Metadata;
import org.elasticsearch.cluster.metadata.MetadataIndexTemplateService;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.EsExecutors;
import org.elasticsearch.core.Tuple;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.IndexMode;
import org.elasticsearch.indices.SystemDataStreamDescriptor;
import org.elasticsearch.indices.SystemIndices;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.index.IndexSettings.PREFER_ILM_SETTING;
public class GetDataStreamsTransportAction extends TransportMasterNodeReadAction<
GetDataStreamAction.Request,
GetDataStreamAction.Response> {
private static final Logger LOGGER = LogManager.getLogger(GetDataStreamsTransportAction.class);
private final SystemIndices systemIndices;
private final ClusterSettings clusterSettings;
private final DataStreamGlobalRetentionResolver dataStreamGlobalRetentionResolver;
@Inject
public GetDataStreamsTransportAction(
TransportService transportService,
ClusterService clusterService,
ThreadPool threadPool,
ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver,
SystemIndices systemIndices,
DataStreamGlobalRetentionResolver dataStreamGlobalRetentionResolver
) {
super(
GetDataStreamAction.NAME,
transportService,
clusterService,
threadPool,
actionFilters,
GetDataStreamAction.Request::new,
indexNameExpressionResolver,
GetDataStreamAction.Response::new,
EsExecutors.DIRECT_EXECUTOR_SERVICE
);
this.systemIndices = systemIndices;
this.dataStreamGlobalRetentionResolver = dataStreamGlobalRetentionResolver;
clusterSettings = clusterService.getClusterSettings();
}
@Override
protected void masterOperation(
Task task,
GetDataStreamAction.Request request,
ClusterState state,
ActionListener<GetDataStreamAction.Response> listener
) throws Exception {
listener.onResponse(
innerOperation(state, request, indexNameExpressionResolver, systemIndices, clusterSettings, dataStreamGlobalRetentionResolver)
);
}
static GetDataStreamAction.Response innerOperation(
ClusterState state,
GetDataStreamAction.Request request,
IndexNameExpressionResolver indexNameExpressionResolver,
SystemIndices systemIndices,
ClusterSettings clusterSettings,
DataStreamGlobalRetentionResolver dataStreamGlobalRetentionResolver
) {
List<DataStream> dataStreams = getDataStreams(state, indexNameExpressionResolver, request);
List<GetDataStreamAction.Response.DataStreamInfo> dataStreamInfos = new ArrayList<>(dataStreams.size());
for (DataStream dataStream : dataStreams) {
final String indexTemplate;
boolean indexTemplatePreferIlmValue = true;
String ilmPolicyName = null;
if (dataStream.isSystem()) {
SystemDataStreamDescriptor dataStreamDescriptor = systemIndices.findMatchingDataStreamDescriptor(dataStream.getName());
indexTemplate = dataStreamDescriptor != null ? dataStreamDescriptor.getDataStreamName() : null;
if (dataStreamDescriptor != null) {
Settings settings = MetadataIndexTemplateService.resolveSettings(
dataStreamDescriptor.getComposableIndexTemplate(),
dataStreamDescriptor.getComponentTemplates()
);
ilmPolicyName = settings.get(IndexMetadata.LIFECYCLE_NAME);
indexTemplatePreferIlmValue = PREFER_ILM_SETTING.get(settings);
}
} else {
indexTemplate = MetadataIndexTemplateService.findV2Template(state.metadata(), dataStream.getName(), false);
if (indexTemplate != null) {
Settings settings = MetadataIndexTemplateService.resolveSettings(state.metadata(), indexTemplate);
ilmPolicyName = settings.get(IndexMetadata.LIFECYCLE_NAME);
indexTemplatePreferIlmValue = PREFER_ILM_SETTING.get(settings);
} else {
LOGGER.warn(
"couldn't find any matching template for data stream [{}]. has it been restored (and possibly renamed)"
+ "from a snapshot?",
dataStream.getName()
);
}
}
ClusterStateHealth streamHealth = new ClusterStateHealth(
state,
dataStream.getIndices().stream().map(Index::getName).toArray(String[]::new)
);
Map<Index, IndexProperties> backingIndicesSettingsValues = new HashMap<>();
Metadata metadata = state.getMetadata();
collectIndexSettingsValues(dataStream, backingIndicesSettingsValues, metadata, dataStream.getIndices());
if (DataStream.isFailureStoreFeatureFlagEnabled() && dataStream.getFailureIndices().isEmpty() == false) {
collectIndexSettingsValues(dataStream, backingIndicesSettingsValues, metadata, dataStream.getFailureIndices());
}
GetDataStreamAction.Response.TimeSeries timeSeries = null;
if (dataStream.getIndexMode() == IndexMode.TIME_SERIES) {
record IndexInfo(String name, Instant timeSeriesStart, Instant timeSeriesEnd) implements Comparable<IndexInfo> {
@Override
public int compareTo(IndexInfo o) {
return Comparator.comparing(IndexInfo::timeSeriesStart).thenComparing(IndexInfo::timeSeriesEnd).compare(this, o);
}
}
List<Tuple<Instant, Instant>> mergedRanges = new ArrayList<>();
Tuple<Instant, Instant> currentMergedRange = null;
IndexInfo previous = null;
// We need indices to be sorted by time series range
// to produce temporal ranges.
// But it is not enforced in API, so we explicitly sort here.
var sortedRanges = dataStream.getIndices()
.stream()
.map(metadata::index)
.filter(m -> m.getIndexMode() == IndexMode.TIME_SERIES)
.map(m -> new IndexInfo(m.getIndex().getName(), m.getTimeSeriesStart(), m.getTimeSeriesEnd()))
.sorted()
.toList();
for (var info : sortedRanges) {
Instant start = info.timeSeriesStart();
Instant end = info.timeSeriesEnd();
if (currentMergedRange == null) {
currentMergedRange = new Tuple<>(start, end);
} else if (currentMergedRange.v2().compareTo(start) == 0) {
currentMergedRange = new Tuple<>(currentMergedRange.v1(), end);
} else if (currentMergedRange.v2().compareTo(start) < 0) {
mergedRanges.add(currentMergedRange);
currentMergedRange = new Tuple<>(start, end);
} else {
String message = "previous backing index ["
+ previous.name()
+ "] range ["
+ previous.timeSeriesStart()
+ "/"
+ previous.timeSeriesEnd()
+ "] range is colliding with current backing ["
+ info.name()
+ "] index range ["
+ start
+ "/"
+ end
+ "]";
assert currentMergedRange.v2().compareTo(start) < 0 : message;
}
previous = info;
}
if (currentMergedRange != null) {
mergedRanges.add(currentMergedRange);
}
timeSeries = new GetDataStreamAction.Response.TimeSeries(mergedRanges);
}
dataStreamInfos.add(
new GetDataStreamAction.Response.DataStreamInfo(
dataStream,
streamHealth.getStatus(),
indexTemplate,
ilmPolicyName,
timeSeries,
backingIndicesSettingsValues,
indexTemplatePreferIlmValue
)
);
}
return new GetDataStreamAction.Response(
dataStreamInfos,
request.includeDefaults() ? clusterSettings.get(DataStreamLifecycle.CLUSTER_LIFECYCLE_DEFAULT_ROLLOVER_SETTING) : null,
dataStreamGlobalRetentionResolver.resolve(state)
);
}
private static void collectIndexSettingsValues(
DataStream dataStream,
Map<Index, IndexProperties> backingIndicesSettingsValues,
Metadata metadata,
List<Index> backingIndices
) {
for (Index index : backingIndices) {
IndexMetadata indexMetadata = metadata.index(index);
Boolean preferIlm = PREFER_ILM_SETTING.get(indexMetadata.getSettings());
assert preferIlm != null : "must use the default prefer ilm setting value, if nothing else";
ManagedBy managedBy;
if (metadata.isIndexManagedByILM(indexMetadata)) {
managedBy = ManagedBy.ILM;
} else if (dataStream.isIndexManagedByDataStreamLifecycle(index, metadata::index)) {
managedBy = ManagedBy.LIFECYCLE;
} else {
managedBy = ManagedBy.UNMANAGED;
}
backingIndicesSettingsValues.put(index, new IndexProperties(preferIlm, indexMetadata.getLifecyclePolicyName(), managedBy));
}
}
static List<DataStream> getDataStreams(
ClusterState clusterState,
IndexNameExpressionResolver iner,
GetDataStreamAction.Request request
) {
List<String> results = DataStreamsActionUtil.getDataStreamNames(iner, clusterState, request.getNames(), request.indicesOptions());
Map<String, DataStream> dataStreams = clusterState.metadata().dataStreams();
return results.stream().map(dataStreams::get).sorted(Comparator.comparing(DataStream::getName)).toList();
}
@Override
protected ClusterBlockException checkBlock(GetDataStreamAction.Request request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
}