Introducing the WSO2 API Manager Statistics Model
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Introduction
This section describes and illustrates the API Manager statistic publishing and generating model. It describes the internal components of API Manager, external analyzer information and other data retrieval components. API Manager generates events based on the API Manager invocation pattern and publishes them to all the listening event analyzers. The analyzer is responsible for the accumulation of all events and generates summary data based on the defined summarisation logic. After the summarized data is generated, the API Manager Dashboard can retrieve statistics from the analyzer data-source to the UI via the API Manager analytics client.
API Manager usage publisher
The internal API Manager component listens to the API Manager invocations and its behavior. Based on the request and responses, the event is generated and published to all the event receivers. This publisher publishes the following event streams,
org.wso2.apimgt.statistics.requestorg.wso2.apimgt.statistics.responseorg.wso2.apimgt.statistics.faultorg.wso2.apimgt.statistics.throttle
Workflow executor
This component publishes the org.wso2.apimgt.statistics.workflow event stream containing work-flow related event data.
Data analyzer
The data analyzer is a summary data generator based on the received event. WSO2 API-M uses WSO2 APIM Analytics to perform analytics tasks. APIM Analytics uses Apache Spark as a processing language. The <APIM-ANALYITCS_HOME>/repository/deployment/server/carbonapps/org_wso2_carbon_analytics_apim-1.0.0.car CAR file (which is deployed in the APIM Analytics server by default) contains details of all summarized data and their destination.
A Carbon Application (C-App) or a CAR file is a collection of artifacts deployable on a WSO2 product instance. These artifacts are usually JAVA-based or XML configurations, designed differently for each product in the WSO2 Carbon platform. You can deploy these artifacts to generate services.
A single WSO2 product can have numerous artifacts such as Axis2 services, dataservices, synapse configurations, endpoints, proxy services, mediators, registry resources, BPEL workflows etc. Usually, these artifacts are created in a development environment and then moved one by one into staging/production environments. Manually configuring artifacts to build up the entire solution this way is a time-consuming task. Instead, you can bundle configuration files and artifacts in a C-App and port Web service based solutions across environments more easily. C-Apps allow you to export your entire solution as a single archive file.
API Manager event streams
API-M 2.1.0 provides six types of event streams as listed below.
org.wso2.apimgt.statistics.request
This stream tracks information for the API request.
meta_clienType : STRING : Meta information of Client type consumerKey : STRING : Consumer key of API invoked client application context : STRING : API context depending on the user's request api_version : STRING : API synapse artifact contained name [API Provider +"--"+API Name] api : STRING : API Name resourcePath : STRING : API resource URL pattern of API request method : STRING : HTTP Verb of API request [e.g.:GET/POST] version : STRING : API version request : INT : Request count (e.g. 1) requestTime : LONG : API request hit time in APIM userId : STRING : API invoked end user name tenantDomain : STRING : Tenant domain of API provider hostName : STRING : API Manager server host apiPublisher : STRING : API provider applicationName : STRING : Name of the client application applicationId : STRING : ID of the client application userAgent : STRING : User agent of the user tier : STRING : Name of the throttling policy assigned to the request throttledOut : BOOL : Describes whether this is a throttled request or not clientip : STRING : IP Adress of the Client applicationOwner: STRING : Name of the Owner of the Application
org.wso2.apimgt.statistics.response
This stream tracks information for the API response. It includes the time taken for the response to get back, the received time etc.
meta_clientType : STRING : Meta information of Client type consumerKey : STRING : Consumer key of the client application invoking the API context : STRING : API context depending on the user's request api_version : STRING : API synapse artifact contained name [API Provider +"--"+API Name] api : STRING : API Name resourcePath : STRING : API resource URL pattern of API request resourceTemplate: STRING : API resource URL template of the API request method : STRING : HTTP Verb of API request [e.g.:GET/POST] version : STRING : API version response : INT : Response count (e.g. 1) responseTime : LONG : Total time taken for request/response flow[serviceTime+backendTime] serviceTime : LONG : Time taken to serve the API request in APIM side backendTime : LONG : Time taken process the request at the backend username : STRING : API invoked end user name eventTime : LONG : Timestamp of response event published tenantDomain : STRING : Tenant domain of API provider hostname : STRING : API Manager server hostname apiPublisher : STRING : API provider applicationName : STRING : Name of the client application applicationId : STRING : ID of the client application cacheHit : BOOL : Describes if response caching is enabled or not responseSize : LONG : Response message size in bytes protocol : STRING : Protocol used to send the response (HTTP/HTTPS) and the port responseCode : STRING : HTTP Response Code destination : STRING : URL of the Desination IP
org.wso2.apimgt.statistics.fault
This stream contains the fault API invocations. It includes the API with back end errors, timeout etc.
meta_clientType : STRING : Meta information of Client Type consumerKey : STRING : Consumer key of the client application invoking the API context : STRING : API context depending on the user's request api_version : STRING : API version api : STRING : API Name resourcePath : STRING : API resource url pattern of API request method : STRING : HTTP Verb of API request [e.g.:GET/POST] version : STRING : API version errorCode : STRING : HTTP error code errorMessage : STRING : Description of error message requestTime : LONG : API request time in millisecond userId : STRING : API invoked end user name tenantDomain : STRING : Tenant domain of API provider hostName : STRING : API Manager server host apiPublisher : STRING : API provider applicationName : STRING : Name of the client application applicationId : STRING : ID of the client application protocol : STRING : Protocol used to send the response (HTTP/HTTPS) and the port
org.wso2.apimgt.statistics.throttle
This stream contains the API invocation with throttle information. Throttling can happen due to any of the following reasons:
The application limit has exceeded.
The resource limit has exceeded.
The API limit has exceeded.
The hard level limit has exceeded.
meta_clientType : STRING : meta information of Client Type accessToken : STRING : Access token of the request userId : STRING : API invoked end user name tenantDomain : STRING : Tenant domain of API provider api : STRING : API Name api_version : STRING : API synapse artifact contained name [API Provider +"--"+API Name] context : STRING : API context depending on the user's request apiPublisher : STRING : API provider throttledTime : LONG : The timestamp which throttle out event triggers applicationName : STRING : Name of the client application applicationId : STRING : ID of the client application subscriber : STRING : Name of the subscriber of the Application throttledOutReason : STRING : The reason describing why the request has been throttled out
org.wso2.apimgt.statistics.workflow
This event stream creates events based on the API Manager workflow and publishes them to the analyzer.
meta_clientType : STRING : meta information of Client Type workflowReference : STRING : Holds the workflow reference ID workflowStatus : STRING : Status of the workflow e.g.: CREATED, APPROVED, REJECTED, REGISTERED tenantDomain : STRING : Tenant domain of subscriber who triggers the workflow in APIStore workflowType : STRING : Type of the workflow e.g.:AM_APPLICATION_CREATION, createdTime : LONG : The workflow was creation time in milliseconds updatedTime : LONG : The last updated time of the workflow in milliseconds
org.wso2.apimgt.statistics.execution.time
This stream contains information relating to API invocation including time stamps and the time taken by the API at different stages of invocation (e.g., time taken to backend, time taken to mediation flow, response time etc.).
meta_clientType : STRING : meta information of Client Type api : STRING : API Name api_version : STRING : API Version tenantDomain : STRING : Tenant domain of subscriber who triggers the workflow in APIStore apiPublisher : STRING : API Provider apiResponseTime : LONG : Total time taken for request/response flow context : STRING : API context depending on the user's request securityLatency : LONG : Time taken for authentication throttlingLatency : LONG : Time taken for throttling the request/response requestMediationLatency : LONG : Time taken to mediate the request responseMediationLatency: LONG : Time taken to mediate the response backendLatency : LONG : Time taken by the backend to return the response otherLatency : LONG : Time taken to process tasks other than mentioned above eventTime : LONG : Timestamp of the sent event
API Manager summarized tables (APIM Analytics internal storage)
Note that these summarized tables are stored in the APIM Analytics internal storage. Both the C-Apps that API Manager deploy on APIM Analytics first stores the summary data into these tables. There are additional columns in some of these tables containing the composition column of other columns. Those columns types are of facet type, which is used to support the aggregation function on the APIM Analytics REST API. All the columns are indexed in order to search using Apache Lucene and supports the APIM Analytics REST API. When API Manager is configured with the RDBMS client, all these tables are replicated in the external RDBMS except for the facet columns.
API_REQUEST_SUMMARY
This table contains the summary data of the request event stream.
API_REQUEST_SUMMARY table schemaCREATE TEMPORARY TABLE API_REQUEST_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_REQUEST_SUMMARY", schema "api string -i, api_version string -i, version string -i, apiPublisher string -i, consumerKey string -i, userId string -i, context string -i, max_request_time long -i, total_request_count int -i, hostName string -i, year int -i, month int -i, day int -i, time string -i, key_api_facet facet -i, key_userId_facet facet -i, api_version_userId_facet facet -i, api_version_userId_apiPublisher_facet facet -i, api_version_userId_context_facet facet -i", primaryKeys "api,api_version,version,apiPublisher,consumerKey,userId,context,hostName,year,month,day" );
API_VERSION_USAGE_SUMMARY
This table contains the summary data for API Manager usage. It is also derived from the request event table.
VERSION_USAGE_SUMMARY table schemaCREATE TEMPORARY TABLE API_VERSION_USAGE_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_VERSION_USAGE_SUMMARY", schema "api string -i, version string -i, apiPublisher string -i, context string -i, total_request_count int -i, hostName string -i, year int -i, month int -i, day int -i, time string -i, max_request_time long -i, api_version_context_facet facet -i", primaryKeys "api,version,apiPublisher,context,hostName,year,month,day" );
API_Resource_USAGE_SUMMARY
This table contains the summarized data for API Manager usage by resources and it is also derived from request event table.
API_Resource_USAGE_SUMMARY table schemaCREATE TEMPORARY TABLE API_Resource_USAGE_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_Resource_USAGE_SUMMARY", schema "api string -i, version string -i, apiPublisher string -i, consumerKey string -i, resourcePath string -i, context string -i, method string -i, total_request_count int -i, hostName string -i, year int -i, month int -i, day int -i, time string -i, max_request_time long -i, key_api_method_path_facet facet -i, api_version_context_method_facet facet -i", primaryKeys "api,version,apiPublisher,consumerKey,context,resourcePath,method,hostName,year,month,day" );
API_RESPONSE_SUMMARY
This table contains the summarized data from API responses. It is derived from the response event table.
API_RESPONSE_SUMMARY table schemaCREATE TEMPORARY TABLE API_RESPONSE_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_RESPONSE_SUMMARY", schema "api_version string -i, apiPublisher string -i, context string -i, serviceTime int -i, total_response_count int -i, hostName string -i, year int -i, month int -i, day int -i, time string -i, max_request_time long -i, api_version_context_facet facet -i", primaryKeys "api,version,apiPublisher,context,hostName,year,month,day" );
API_FAULT_SUMMARY
This table contains the summarized data of faulty API invocations and is derived from the fault event stream.
API_FAULT_SUMMARY table schemaCREATE TEMPORARY TABLE API_FAULT_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_FAULT_SUMMARY", schema "api string -i, version string -i, apiPublisher string -i, consumerKey string -i, context string -i, total_fault_count int -i, hostName string -i, year int -i, month int -i, day int -i, time string -i, max_request_time long -i, consumerKey_api_facet facet -i, api_version_apiPublisher_context_facet facet -i", primaryKeys "api,version,apiPublisher,consumerKey,context,hostName,year,month,day" );
API_DESTINATION_SUMMARY
This table contains the summarized data of the API destinations and is derived from the destination event stream.
API_DESTINATION_SUMMARY table schemaCREATE TEMPORARY TABLE API_DESTINATION_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_DESTINATION_SUMMARY", schema "api string -i, version string -i, apiPublisher string -i, context string -i, destination string -i, total_request_count int -i, hostName string -i, year int -i, month int -i, day int -i, time string -i, max_request_time long -i, api_version_context_dest_facet facet -i", primaryKeys "api,version,apiPublisher,context,destination,hostName,year,month,day" );
API_LAST_ACCESS_TIME_SUMMARY
This table contains the summary data of the last access times of the API and is derived from the request event stream.
API_LAST_ACCESS_TIME_SUMMARY table schemaCREATE TEMPORARY TABLE API_LAST_ACCESS_TIME_SUMMARY_FINAL USING CarbonAnalytics OPTIONS (tableName "API_LAST_ACCESS_TIME_SUMMARY", schema "tenantDomain string -i, apiPublisher string -i, api string -i, version string -i, userId string -i, context string -i, max_request_time long -i", primaryKeys "tenantDomain,apiPublisher,api" );
API_THROTTLED_OUT_SUMMARY
This table contains the summary of the throttle out API invocation data. It is derived from the throttle out event table and request table.
API_THROTTLED_OUT_SUMMARY table schemaCREATE TEMPORARY TABLE THROTTLED_OUT_FINAL_SUMMARY USING CarbonAnalytics OPTIONS (tableName "API_THROTTLED_OUT_SUMMARY", schema "api string -i, api_version string -i, context string -i, apiPublisher string -i, applicationName string -i, tenantDomain string -i, year int -i, month int -i, day int -i, week int -i, time string -i, success_request_count int -i, throttleout_count int -i, max_request_time long -i, api_year_month_week_day_facet facet -i, applicationName_facet facet -i", primaryKeys "api,api_version,context,apiPublisher,applicationName,tenantDomain,year,month,day" );
API Manager statistics
API statistics are provided in both the API Publisher and the API Store. Apart from the number of subscriptions per API, all other statistical dashboards require an instance of WSO2 Data Analytics Server installed. For information on the available statistics and how to view them, see Viewing API Statistics.