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Backend Support
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// Template Interface and GeneralPolicyTemplateDesc for API interface GeneralPolicyTemplate { Class<?> getType(); // org.apache.eagle.policy.GeneralPolicyTemplateBuilder {GeneralPolicyTemplate PolicyDefinition build(GeneralPolicyConfigs); } // Metadata GeneralPolicyTemplate { type: String getName(); // "SINGLE_SOURCE_THRESHOLD_ALERT" String name: "Single Source Threshold Alert", description: "getDescription(); // "An alert policy template consuming single stream source." String view:getView(); // "/path/to/form", builder Class<GeneralPolicyConfig> getConfigType(); PolicyDefinition render(GeneralPolicyConfig); } // Static Template Metadata} GeneralPolicyEntity { config: GeneralPolicyTemplateConfig, template: "org.apache.eagle.policy.GeneralPolicyTemplateBuilder", configs: { GeneralPolicyTemplate" } // Case Example SingleStreamThresholdPolicyTemplateConfig extend GeneralPolicyTemplateConfig { from: HDFS_AUDIT_SRC_STREAM, partition: { type: "GROUPBY",field: "USER" }, window: { type: "SLIDING_WINDOW", configs: { length: "20 hour" } }, aggregators: [ { function: "SUM", field: "USER", alias: "USER_COUNT" } ], filters: [ { field: "USER_COUNT", function: ">", value: 20 }, { field: "USER", function: "NOT IN", value: "HADOOP, HDFS, MAPRED" } ] } } |
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