sk0x50 commented on code in PR #5901: URL: https://github.com/apache/ignite-3/pull/5901#discussion_r2109606685
########## modules/cluster-management/src/main/java/org/apache/ignite/internal/cluster/management/metrics/ClusterTopologyMetricsSource.java: ########## @@ -0,0 +1,141 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF 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 + * + * 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. + */ + +package org.apache.ignite.internal.cluster.management.metrics; + +import java.util.List; +import java.util.UUID; +import java.util.function.Supplier; +import org.apache.ignite.internal.cluster.management.ClusterTag; +import org.apache.ignite.internal.cluster.management.topology.LogicalTopology; +import org.apache.ignite.internal.metrics.AbstractMetricSource; +import org.apache.ignite.internal.metrics.IntGauge; +import org.apache.ignite.internal.metrics.Metric; +import org.apache.ignite.internal.metrics.ObjectGauge; +import org.jetbrains.annotations.Nullable; + +/** + * The source of cluster topology metrics. + */ +public class ClusterTopologyMetricsSource extends AbstractMetricSource<ClusterTopologyMetricsSource.Holder> { + /** Source name. */ + static final String SOURCE_NAME = "topology.cluster"; + + /** Logical topology. */ + private final LogicalTopology logicalTopology; + + /** Provider of the cluster's tag. */ + private final Supplier<ClusterTag> clusterTagSupplier; + + /** + * Creates a new instance of the topology metrics source. + * + * @param logicalTopology Logical topology. + * @param clusterTagSupplier Supplier of the cluster's tag. + */ + public ClusterTopologyMetricsSource(LogicalTopology logicalTopology, Supplier<ClusterTag> clusterTagSupplier) { + super(SOURCE_NAME); + + this.logicalTopology = logicalTopology; + this.clusterTagSupplier = clusterTagSupplier; + } + + @Override + protected Holder createHolder() { + return new Holder(); + } + + /** + * Returns name of the cluster. + * + * @return Name of the cluster, or empty string if the holder is not initialized. + */ + public String clusterName() { + Holder h = holder(); + + if (h == null) { + return ""; + } + + return h.clusterName.value(); + } + + /** + * Returns the unique identifier of the cluster. + * + * @return Returns the unique identifier of the cluster, or {@code null} if the holder is not initialized. + */ + public @Nullable UUID clusterId() { + Holder h = holder(); + + if (h == null) { + return null; + } + + return h.clusterId.value(); + } + + /** + * Returns the total number of nodes in the logical topology. + * + * @return Returns the total number of nodes in the logical topology, or {@code 0} if the holder is not initialized. + */ + public int totalNodes() { + Holder h = holder(); + + if (h == null) { + return 0; + } + + return h.clusterSize.value(); + } + + /** Holder. */ + protected class Holder implements AbstractMetricSource.Holder<Holder> { + private final IntGauge clusterSize = new IntGauge( + "TotalNodes", + "Number of nodes in the logical topology", + () -> logicalTopology.getLogicalTopology().nodes().size()); + + private final ObjectGauge<UUID> clusterId = new ObjectGauge<>( Review Comment: Ok. `StringGauge` and `UuidGauge` are added. ########## modules/metrics/src/main/java/org/apache/ignite/internal/metrics/ObjectMetricImpl.java: ########## @@ -0,0 +1,64 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF 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 + * + * 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. + */ + +package org.apache.ignite.internal.metrics; + +import org.jetbrains.annotations.Nullable; + +/** + * Implementation of {@link ObjectMetric}. + */ +public class ObjectMetricImpl<T> extends AbstractMetric implements ObjectMetric<T> { + /** Value. */ + private volatile T val; + + /** Type. */ + private final Class<T> type; + + /** + * Creates a new instance of ObjectMetricImpl. + * + * @param name Name. + * @param desc Description. + * @param type Type. + */ + public ObjectMetricImpl(String name, @Nullable String desc, Class<T> type) { Review Comment: Removed. -- This is an automated message from the Apache Git Service. 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