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Signed-off-by: Chen Dai <[email protected]>
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flint-core/src/main/scala/org/opensearch/flint/core/metadata/log/FlintMetadataLog.java
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| @@ -0,0 +1,18 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package org.opensearch.flint.core.metadata.log; | ||
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| import java.util.Optional; | ||
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| /** | ||
| * Flint metadata log. | ||
| */ | ||
| public interface FlintMetadataLog<T> { | ||
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| T add(T logEntry); | ||
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| Optional<T> getLatest(); | ||
| } |
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128
...ore/src/main/scala/org/opensearch/flint/core/metadata/log/FlintOpenSearchMetadataLog.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package org.opensearch.flint.core.metadata.log; | ||
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| import java.io.IOException; | ||
| import java.util.Base64; | ||
| import java.util.Optional; | ||
| import java.util.logging.Logger; | ||
| import org.opensearch.OpenSearchException; | ||
| import org.opensearch.action.get.GetRequest; | ||
| import org.opensearch.action.get.GetResponse; | ||
| import org.opensearch.action.index.IndexRequest; | ||
| import org.opensearch.action.index.IndexResponse; | ||
| import org.opensearch.action.support.WriteRequest; | ||
| import org.opensearch.action.update.UpdateRequest; | ||
| import org.opensearch.action.update.UpdateResponse; | ||
| import org.opensearch.client.RequestOptions; | ||
| import org.opensearch.client.RestHighLevelClient; | ||
| import org.opensearch.common.xcontent.XContentType; | ||
| import org.opensearch.flint.core.FlintClient; | ||
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| /** | ||
| * Flint metadata log in OpenSearch store. | ||
| */ | ||
| public class FlintOpenSearchMetadataLog implements FlintMetadataLog<FlintMetadataLogEntry> { | ||
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| private static final Logger LOG = Logger.getLogger(FlintOpenSearchMetadataLog.class.getName()); | ||
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| /** | ||
| * Flint client to create Rest OpenSearch client (This will be refactored later) | ||
| */ | ||
| private final FlintClient flintClient; | ||
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| /** | ||
| * Reuse query request index as Flint metadata log store | ||
| */ | ||
| private final String metadataLogIndexName; | ||
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| /** | ||
| * Doc id for latest log entry (Naming rule is static so no need to query Flint index metadata) | ||
| */ | ||
| private final String latestId; | ||
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| public FlintOpenSearchMetadataLog(FlintClient flintClient, String flintIndexName, String metadataLogIndexName) { | ||
| this.flintClient = flintClient; | ||
| this.latestId = Base64.getEncoder().encodeToString(flintIndexName.getBytes()); | ||
| this.metadataLogIndexName = metadataLogIndexName; | ||
| } | ||
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| @Override | ||
| public FlintMetadataLogEntry add(FlintMetadataLogEntry logEntry) { | ||
| // TODO: use single doc for now. this will be always append in future. | ||
| FlintMetadataLogEntry latest; | ||
| if (logEntry.id().isEmpty()) { | ||
| latest = createLogEntry(logEntry); | ||
| } else { | ||
| latest = updateLogEntry(logEntry); | ||
| } | ||
| return latest; | ||
| } | ||
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| @Override | ||
| public Optional<FlintMetadataLogEntry> getLatest() { | ||
| try (RestHighLevelClient client = flintClient.createClient()) { | ||
| GetResponse response = | ||
| client.get(new GetRequest(metadataLogIndexName, latestId), RequestOptions.DEFAULT); | ||
| if (response.isExists()) { | ||
| return Optional.of( | ||
| new FlintMetadataLogEntry( | ||
| response.getId(), | ||
| response.getSeqNo(), | ||
| response.getPrimaryTerm(), | ||
| response.getSourceAsMap())); | ||
| } else { | ||
| return Optional.empty(); | ||
| } | ||
| } catch (Exception e) { | ||
| throw new IllegalStateException("Failed to fetch latest metadata log entry", e); | ||
| } | ||
| } | ||
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| private FlintMetadataLogEntry createLogEntry(FlintMetadataLogEntry logEntry) { | ||
| LOG.info("Creating log entry " + logEntry); | ||
| try (RestHighLevelClient client = flintClient.createClient()) { | ||
| logEntry = logEntry.copy( | ||
| latestId, | ||
| logEntry.seqNo(), logEntry.primaryTerm(), logEntry.state(), logEntry.dataSource(), logEntry.error()); | ||
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| IndexResponse response = client.index( | ||
| new IndexRequest() | ||
| .index(metadataLogIndexName) | ||
| .id(logEntry.id()) | ||
| .source(logEntry.toJson(), XContentType.JSON), | ||
| RequestOptions.DEFAULT); | ||
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| // Update seqNo and primaryTerm in log entry object | ||
| return logEntry.copy( | ||
| logEntry.id(), response.getSeqNo(), response.getPrimaryTerm(), | ||
| logEntry.state(), logEntry.dataSource(), logEntry.error()); | ||
| } catch (OpenSearchException | IOException e) { | ||
| throw new IllegalStateException("Failed to create initial log entry", e); | ||
| } | ||
| } | ||
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| private FlintMetadataLogEntry updateLogEntry(FlintMetadataLogEntry logEntry) { | ||
| LOG.info("Updating log entry " + logEntry); | ||
| try (RestHighLevelClient client = flintClient.createClient()) { | ||
| UpdateResponse response = | ||
| client.update( | ||
| new UpdateRequest(metadataLogIndexName, logEntry.id()) | ||
| .doc(logEntry.toJson(), XContentType.JSON) | ||
| .setRefreshPolicy(WriteRequest.RefreshPolicy.WAIT_UNTIL) | ||
| .setIfSeqNo(logEntry.seqNo()) | ||
| .setIfPrimaryTerm(logEntry.primaryTerm()), | ||
| RequestOptions.DEFAULT); | ||
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| // Update seqNo and primaryTerm in log entry object | ||
| return logEntry.copy( | ||
| logEntry.id(), response.getSeqNo(), response.getPrimaryTerm(), | ||
| logEntry.state(), logEntry.dataSource(), logEntry.error()); | ||
| } catch (OpenSearchException | IOException e) { | ||
| throw new IllegalStateException("Failed to update log entry: " + logEntry, e); | ||
| } | ||
| } | ||
| } |
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