xds: ORCA to LRS propagation changes #12203
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| @@ -0,0 +1,110 @@ | ||
| /* | ||
| * Copyright 2025 The gRPC Authors | ||
| * | ||
| * 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. | ||
| */ | ||
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| package io.grpc.xds; | ||
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| import static com.google.common.base.Preconditions.checkNotNull; | ||
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| import com.google.common.collect.ImmutableSet; | ||
| import io.grpc.Internal; | ||
| import javax.annotation.Nullable; | ||
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| /** | ||
| * Represents the configuration for which ORCA metrics should be propagated from backend | ||
| * to LRS load reports, as defined in gRFC A85. | ||
| */ | ||
| @Internal | ||
| public final class BackendMetricPropagation { | ||
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| public final boolean propagateCpuUtilization; | ||
| public final boolean propagateMemUtilization; | ||
| public final boolean propagateApplicationUtilization; | ||
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| private final boolean propagateAllNamedMetrics; | ||
| private final ImmutableSet<String> namedMetricKeys; | ||
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| private BackendMetricPropagation( | ||
| boolean propagateCpuUtilization, | ||
| boolean propagateMemUtilization, | ||
| boolean propagateApplicationUtilization, | ||
| boolean propagateAllNamedMetrics, | ||
| ImmutableSet<String> namedMetricKeys) { | ||
| this.propagateCpuUtilization = propagateCpuUtilization; | ||
| this.propagateMemUtilization = propagateMemUtilization; | ||
| this.propagateApplicationUtilization = propagateApplicationUtilization; | ||
| this.propagateAllNamedMetrics = propagateAllNamedMetrics; | ||
| this.namedMetricKeys = checkNotNull(namedMetricKeys, "namedMetricKeys"); | ||
| } | ||
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| /** | ||
| * Creates a BackendMetricPropagation from a list of metric specifications. | ||
| * | ||
| * @param metricSpecs list of metric specification strings from CDS resource | ||
| * @return BackendMetricPropagation instance | ||
| */ | ||
| public static BackendMetricPropagation fromMetricSpecs(@Nullable java.util.List<String> metricSpecs) { | ||
| if (metricSpecs == null || metricSpecs.isEmpty()) { | ||
| return new BackendMetricPropagation(false, false, false, false, ImmutableSet.of()); | ||
| } | ||
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| boolean propagateCpuUtilization = false; | ||
| boolean propagateMemUtilization = false; | ||
| boolean propagateApplicationUtilization = false; | ||
| boolean propagateAllNamedMetrics = false; | ||
| ImmutableSet.Builder<String> namedMetricKeysBuilder = ImmutableSet.builder(); | ||
| for (String spec : metricSpecs) { | ||
| if (spec == null) { | ||
| continue; | ||
| } | ||
| switch (spec) { | ||
| case "cpu_utilization": | ||
| propagateCpuUtilization = true; | ||
| break; | ||
| case "mem_utilization": | ||
| propagateMemUtilization = true; | ||
| break; | ||
| case "application_utilization": | ||
| propagateApplicationUtilization = true; | ||
| break; | ||
| case "named_metrics.*": | ||
| propagateAllNamedMetrics = true; | ||
| break; | ||
| default: | ||
| if (spec.startsWith("named_metrics.")) { | ||
| String metricKey = spec.substring("named_metrics.".length()); | ||
| if (!metricKey.isEmpty()) { | ||
| namedMetricKeysBuilder.add(metricKey); | ||
| } | ||
| } | ||
| break; | ||
| } | ||
| } | ||
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| return new BackendMetricPropagation( | ||
| propagateCpuUtilization, | ||
| propagateMemUtilization, | ||
| propagateApplicationUtilization, | ||
| propagateAllNamedMetrics, | ||
| namedMetricKeysBuilder.build()); | ||
| } | ||
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| /** | ||
| * Returns whether the given named metric key should be propagated. | ||
| */ | ||
| public boolean shouldPropagateNamedMetric(String metricKey) { | ||
| return propagateAllNamedMetrics || namedMetricKeys.contains(metricKey); | ||
| } | ||
| } | ||
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Why is this required ?