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HTTP63 HTTP63 caching for synchronous lookups
Signed-off-by: David Radley <[email protected]>
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88 changes: 88 additions & 0 deletions
88
...a/com/getindata/connectors/http/internal/table/lookup/CachingHttpTableLookupFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package com.getindata.connectors.http.internal.table.lookup; | ||
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| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
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| import lombok.AccessLevel; | ||
| import lombok.Getter; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.apache.flink.annotation.VisibleForTesting; | ||
| import org.apache.flink.api.common.serialization.DeserializationSchema; | ||
| import org.apache.flink.table.connector.source.lookup.cache.LookupCache; | ||
| import org.apache.flink.table.data.RowData; | ||
| import org.apache.flink.table.functions.FunctionContext; | ||
| import org.apache.flink.table.functions.LookupFunction; | ||
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| import com.getindata.connectors.http.internal.PollingClient; | ||
| import com.getindata.connectors.http.internal.PollingClientFactory; | ||
| import com.getindata.connectors.http.internal.utils.SerializationSchemaUtils; | ||
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| @Slf4j | ||
| public class CachingHttpTableLookupFunction extends LookupFunction { | ||
| private final PollingClientFactory<RowData> pollingClientFactory; | ||
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| private final DeserializationSchema<RowData> responseSchemaDecoder; | ||
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| @VisibleForTesting | ||
| @Getter(AccessLevel.PACKAGE) | ||
| private final LookupRow lookupRow; | ||
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| @VisibleForTesting | ||
| @Getter(AccessLevel.PACKAGE) | ||
| private final HttpLookupConfig options; | ||
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| private transient AtomicInteger localHttpCallCounter; | ||
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| private transient PollingClient<RowData> client; | ||
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| private LookupCache cache; | ||
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| public CachingHttpTableLookupFunction( | ||
| PollingClientFactory<RowData> pollingClientFactory, | ||
| DeserializationSchema<RowData> responseSchemaDecoder, | ||
| LookupRow lookupRow, | ||
| HttpLookupConfig options, | ||
| LookupCache cache) { | ||
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| this.pollingClientFactory = pollingClientFactory; | ||
| this.responseSchemaDecoder = responseSchemaDecoder; | ||
| this.lookupRow = lookupRow; | ||
| this.options = options; | ||
| this.cache = cache; | ||
| } | ||
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| @Override | ||
| public void open(FunctionContext context) throws Exception { | ||
| super.open(context); | ||
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| this.responseSchemaDecoder.open( | ||
| SerializationSchemaUtils | ||
| .createDeserializationInitContext(CachingHttpTableLookupFunction.class)); | ||
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| this.localHttpCallCounter = new AtomicInteger(0); | ||
| this.client = pollingClientFactory | ||
| .createPollClient(options, responseSchemaDecoder); | ||
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| context | ||
| .getMetricGroup() | ||
| .gauge("http-table-lookup-call-counter", () -> localHttpCallCounter.intValue()); | ||
| } | ||
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| /** | ||
| * This is a lookup method which is called by Flink framework at runtime. | ||
| */ | ||
| @Override | ||
| public Collection<RowData> lookup(RowData keyRow) throws IOException { | ||
| log.debug("lookup=" + lookupRow); | ||
| localHttpCallCounter.incrementAndGet(); | ||
| Optional<RowData> rowData= client.pull(keyRow); | ||
| List<RowData> result = new ArrayList<>(); | ||
| rowData.ifPresent(row -> { result.add(row); }); | ||
| log.debug("lookup result=" + result); | ||
| return result; | ||
| } | ||
| } |
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