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Motivation: Enhance Central Dogma's capabilities by introducing support for the xDS protocol. This enables Envoy or xDS clients to utilize Central Dogma as a control plane. https://www.envoyproxy.io/docs/envoy/latest/api-docs/xds_protocol Modifications: - Establish internal repositories for xDS resources within an internal project. - Add gRPC services for xDS protocol from the `io.envoyproxy.controlplane` library. - Customized resource versioning to include all resources in the request. Result: - You can now use Central Dogma as a control plane for xDS service discovery.
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| dependencies { | ||
| implementation project(':server') | ||
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| implementation libs.armeria.grpc | ||
| implementation libs.controlplane.cache | ||
| implementation libs.controlplane.server | ||
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| testImplementation libs.armeria.junit5 | ||
| testImplementation libs.armeria.xds | ||
| testImplementation libs.testcontainers.junit.jupiter | ||
| } |
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xds/src/main/java/com/linecorp/centraldogma/xds/internal/CentralDogmaSnapshot.java
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Copyright 2023 LINE Corporation | ||
| * | ||
| * LINE Corporation 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: | ||
| * | ||
| * https://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 com.linecorp.centraldogma.xds.internal; | ||
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| import java.util.Map; | ||
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| import com.google.common.base.MoreObjects; | ||
| import com.google.common.base.Objects; | ||
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| import io.envoyproxy.controlplane.cache.Resources.ResourceType; | ||
| import io.envoyproxy.controlplane.cache.SnapshotResources; | ||
| import io.envoyproxy.controlplane.cache.VersionedResource; | ||
| import io.envoyproxy.controlplane.cache.v3.Snapshot; | ||
| import io.envoyproxy.envoy.config.cluster.v3.Cluster; | ||
| import io.envoyproxy.envoy.config.endpoint.v3.ClusterLoadAssignment; | ||
| import io.envoyproxy.envoy.config.listener.v3.Listener; | ||
| import io.envoyproxy.envoy.config.route.v3.RouteConfiguration; | ||
| import io.envoyproxy.envoy.extensions.transport_sockets.tls.v3.Secret; | ||
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| final class CentralDogmaSnapshot extends Snapshot { | ||
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| private final SnapshotResources<Cluster> clusters; | ||
| private final SnapshotResources<ClusterLoadAssignment> endpoints; | ||
| private final SnapshotResources<Listener> listeners; | ||
| private final SnapshotResources<RouteConfiguration> routes; | ||
| private final SnapshotResources<Secret> secrets; | ||
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| CentralDogmaSnapshot(SnapshotResources<Cluster> clusters, | ||
| SnapshotResources<ClusterLoadAssignment> endpoints, | ||
| SnapshotResources<Listener> listeners, SnapshotResources<RouteConfiguration> routes, | ||
| SnapshotResources<Secret> secrets) { | ||
| this.clusters = clusters; | ||
| this.endpoints = endpoints; | ||
| this.listeners = listeners; | ||
| this.routes = routes; | ||
| this.secrets = secrets; | ||
| } | ||
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| @Override | ||
| public SnapshotResources<Cluster> clusters() { | ||
| return clusters; | ||
| } | ||
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| @Override | ||
| public SnapshotResources<ClusterLoadAssignment> endpoints() { | ||
| return endpoints; | ||
| } | ||
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| @Override | ||
| public SnapshotResources<Listener> listeners() { | ||
| return listeners; | ||
| } | ||
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| @Override | ||
| public SnapshotResources<RouteConfiguration> routes() { | ||
| return routes; | ||
| } | ||
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| @Override | ||
| public SnapshotResources<Secret> secrets() { | ||
| return secrets; | ||
| } | ||
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| @Override | ||
| public Map<String, VersionedResource<?>> versionedResources(ResourceType resourceType) { | ||
| // Have to override this method because of the type inference. | ||
| return super.versionedResources(resourceType); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (!(o instanceof CentralDogmaSnapshot)) { | ||
| return false; | ||
| } | ||
| final CentralDogmaSnapshot that = (CentralDogmaSnapshot) o; | ||
| return Objects.equal(clusters, that.clusters) && | ||
| Objects.equal(endpoints, that.endpoints) && | ||
| Objects.equal(listeners, that.listeners) && | ||
| Objects.equal(routes, that.routes) && | ||
| Objects.equal(secrets, that.secrets); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hashCode(clusters, endpoints, listeners, routes, secrets); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return MoreObjects.toStringHelper(this) | ||
| .add("clusters", clusters) | ||
| .add("endpoints", endpoints) | ||
| .add("listeners", listeners) | ||
| .add("routes", routes) | ||
| .add("secrets", secrets) | ||
| .toString(); | ||
| } | ||
| } |
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