Master for metrics #8
Conversation
WalkthroughA significant update introduces JMX metrics reporting via a new Changes
Sequence DiagramsequenceDiagram
participant User
participant HugeGraphServer
participant MetricsAPI
participant JmxReporter
User->>HugeGraphServer: Send Graph Data Request
HugeGraphServer->>MetricsAPI: Invoke Metrics Handler
MetricsAPI->>JmxReporter: Report Metrics Data
JmxReporter->>System: Store/Display Metrics via JMX
System-->>User: Display Updated Metrics
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Actionable comments posted: 3
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (22)
- hugegraph-api/README.txt (1 hunks)
- hugegraph-api/pom.xml (1 hunks)
- hugegraph-api/src/main/java/com/codahale/metrics/JmxReporter.java (1 hunks)
- hugegraph-api/src/main/java/org/apache/hugegraph/api/API.java (1 hunks)
- hugegraph-api/src/main/java/org/apache/hugegraph/api/metrics/MetricsAPI.java (6 hunks)
- hugegraph-api/src/main/java/org/apache/hugegraph/core/GraphManager.java (1 hunks)
- hugegraph-api/src/main/java/org/apache/hugegraph/metrics/MetricsUtil.java (1 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/cache/CachedBackendStore.java (1 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/store/BackendSessionPool.java (1 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/AbstractTransaction.java (1 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/GraphTransaction.java (2 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/HugeTraverser.java (4 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/KoutTraverser.java (2 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/OltpTraverser.java (3 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/records/SingleWayMultiPathsRecords.java (1 hunks)
- hugegraph-core/src/main/java/org/apache/hugegraph/util/Consumers.java (1 hunks)
- hugegraph-dist/pom.xml (1 hunks)
- hugegraph-dist/src/assembly/static/bin/hugegraph-server.sh (1 hunks)
- hugegraph-dist/src/assembly/static/conf/gremlin-server.yaml (1 hunks)
- hugegraph-dist/src/assembly/static/conf/jmx_exporter.yml (1 hunks)
- hugegraph-hbase/src/main/java/org/apache/hugegraph/backend/store/hbase/HbaseSessions.java (1 hunks)
- hugegraph-hbase/src/main/java/org/apache/hugegraph/backend/store/hbase/HbaseStore.java (1 hunks)
Files skipped from review due to trivial changes (11)
- hugegraph-api/README.txt
- hugegraph-api/src/main/java/org/apache/hugegraph/api/API.java
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/cache/CachedBackendStore.java
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/AbstractTransaction.java
- hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/GraphTransaction.java
- hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/records/SingleWayMultiPathsRecords.java
- hugegraph-core/src/main/java/org/apache/hugegraph/util/Consumers.java
- hugegraph-dist/pom.xml
- hugegraph-dist/src/assembly/static/conf/jmx_exporter.yml
- hugegraph-hbase/src/main/java/org/apache/hugegraph/backend/store/hbase/HbaseSessions.java
- hugegraph-hbase/src/main/java/org/apache/hugegraph/backend/store/hbase/HbaseStore.java
Additional comments not posted (12)
hugegraph-dist/src/assembly/static/conf/gremlin-server.yaml (1)
111-111: Approval of JMX Reporter ConfigurationEnabling the JMX reporter is a standard practice for enhancing monitoring capabilities. Ensure that the JMX port and other related configurations are set correctly and that this change does not unexpectedly consume more resources.
hugegraph-core/src/main/java/org/apache/hugegraph/backend/store/BackendSessionPool.java (1)
66-66: Approval of Enhanced Logging for Session ManagementThe addition of detailed session count logging in
getOrNewSessionaids in better monitoring and debugging of session management. Ensure that this logging does not introduce significant performance overhead, especially in high-throughput scenarios.hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/KoutTraverser.java (1)
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97-117: Approval of New Method and Comments inKoutTraverserThe addition of the
customizedKoutmethod enhances the flexibility of graph traversal with custom conditions. The detailed comments improve the understandability of the algorithm. Consider adding unit tests to verify the functionality and performance of this new method.hugegraph-dist/src/assembly/static/bin/hugegraph-server.sh (1)
150-151: Approval of Java Options and Security Enhancements in Startup ScriptThe inclusion of a Java agent for JMX monitoring and conditional security settings enhances the server's capabilities and security. Ensure that the paths and options are correctly specified and tested in various deployment environments.
hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/OltpTraverser.java (1)
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83-113: Approval of Concurrency Enhancements inOltpTraverserThe modifications to the
traverseIdsandtraversemethods enhance the concurrency handling of graph traversal operations. The added comments clarify the changes and their implications. Thorough testing is recommended to ensure that these enhancements do not introduce new issues.hugegraph-api/pom.xml (1)
157-161: Approved addition ofmetrics-jmxdependency.Ensure that the version
4.2.4ofmetrics-jmxis compatible with other project dependencies to avoid any conflicts.hugegraph-api/src/main/java/org/apache/hugegraph/metrics/MetricsUtil.java (2)
53-69: Review of metric registration methods.The methods for registering various metrics types (
Gauge,Counter,Histogram,Meter,Timer) have been correctly implemented using theMetricRegistry.namemethod for naming consistency.
72-148: Enhancements to Prometheus metrics formatting are well-implemented.The method
writePrometheuseffectively iterates over different metric types, formats them according to Prometheus standards, and appends them to the providedStringBuilder. This is crucial for integrating with Prometheus monitoring tools efficiently.hugegraph-api/src/main/java/org/apache/hugegraph/api/metrics/MetricsAPI.java (2)
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100-123: Security roles and exception handling inbackendmethod.The method correctly restricts access to admin roles and handles potential exceptions when fetching backend metrics. This is crucial for both security and reliability.
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129-295: Comprehensive handling of different metric types inprometheuseAllmethod.The method effectively gathers and formats all available metrics for Prometheus. It's well-structured and covers various metric types, ensuring a thorough reporting mechanism.
hugegraph-api/src/main/java/com/codahale/metrics/JmxReporter.java (1)
19-630: Comprehensive implementation of JMX reporting functionality.The
JmxReporterclass along with its nested classes and interfaces provides a robust framework for JMX metric reporting. This includes methods for starting, stopping, and closing the reporter, as well as detailed implementations for different metric types.hugegraph-core/src/main/java/org/apache/hugegraph/traversal/algorithm/HugeTraverser.java (1)
182-186: Refactor Approved: Use ofExtendableIteratorandLimitIteratorThe use of
ExtendableIteratorandLimitIteratorin the methodedgesOfVertexis a good practice for enhancing development efficiency and data handling. However, the comments could be more specific about how these changes contribute to performance or maintainability improvements.
| public Set<HugeGraph> graphs(String graph) { | ||
| Set<HugeGraph> graphs = new HashSet<>(); | ||
| for (Graph g : this.graphs.values()) { | ||
| graphs.add((HugeGraph) g); | ||
| } | ||
| return graphs; | ||
| } |
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Add Documentation and Clarify Method Purpose
The method graphs(String graph) is added to return a set of HugeGraph objects. However, the method name and its parameter suggest it might be filtering graphs by a name or identifier, but the implementation returns all graphs regardless of the input. This can be misleading.
- Documentation: The method lacks Javadoc, which is crucial for understanding its purpose and usage, especially in a public API.
- Method Naming: Consider renaming the method to better reflect its functionality, such as
getAllGraphs()if it's intended to return all graphs.
/**
* Retrieves all available graphs as a set of {@link HugeGraph} instances.
* @return a set of all graphs
*/
public Set<HugeGraph> getAllGraphs() {
Set<HugeGraph> graphs = new HashSet<>();
for (Graph g : this.graphs.values()) {
graphs.add((HugeGraph) g);
}
return graphs;
}| @@ -200,7 +204,7 @@ protected Iterator<Edge> edgesOfVertex(Id source, EdgeStep edgeStep) { | |||
| edgeStep.direction(), | |||
| edgeStep.labels(), | |||
| edgeStep.limit()); | |||
| return edgeStep.skipSuperNodeIfNeeded(edges); | |||
| return edgeStep.skipSuperNodeIfNeeded(edges);//此处拉取全量边数据，然后过滤，拒绝超级节点，但是对于存储层不一定有意义 | |||
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Consider Performance Impact of Skipping Super Nodes
The method now includes a call to skipSuperNodeIfNeeded after fetching all edge data, which may not be efficient, especially for storage layers with a significant number of super nodes. Consider modifying the approach to filter super nodes earlier in the query process to reduce unnecessary data fetching.
| @@ -396,7 +400,7 @@ public static <K, V extends Comparable<? super V>> Map<K, V> topN( | |||
| } | |||
| return results; | |||
| } | |||
|
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| // 核心逻辑过滤超级节点，防止计算层OOM | |||
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Method Addition: Handling Super Nodes
The addition of skipSuperNodeIfNeeded is crucial for preventing computation layer OOM by filtering out super nodes. However, consider improving the handling when the skip degree is exceeded, perhaps by logging this event or providing a partial result rather than returning an empty iterator.
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Due to the lack of activity, the current pr is marked as stale and will be closed after 180 days, any update will remove the stale label |
Purpose of the PR
Main Changes
Verifying these changes
Does this PR potentially affect the following parts?
Documentation Status
Doc - TODODoc - DoneDoc - No NeedSummary by CodeRabbit
New Features
GraphManagerwith a new method to manage HugeGraph objects.Improvements
BackendSessionPool.HugeTraverserfor better performance and resource management.Documentation
Configuration
gremlin-server.yaml.jmx_exporter.ymlfor JMX monitoring configuration.hugegraph-server.shto include Java options for JMX monitoring.