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This is more a workaround than a serious solution. Please consider sponsoring one by buying a subscription.

How to create a report? There are currently two options:

  1. Directly creating a task that will create the report.
  2. Using the Report API via Groovy script embedded in a bulk action.

Option 1: Creating the task that will create the report

We have chosen audit log report with two parameters filled in (fromto).

create-task-with-report.bat
curl.exe -v --user administrator:5ecr3t -H "Content-Type: application/xml" -X POST "http://localhost:8080/midpoint/ws/rest/tasks" -d @task-with-report.xml
task-with-report.xml
<task xmlns="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:c="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:org="http://midpoint.evolveum.com/xml/ns/public/common/org-3">
    <name>Run audit log report</name>
    <extension xmlns:rext="http://midpoint.evolveum.com/xml/ns/public/report/extension-3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="c:ExtensionType">
        <rext:reportParam xsi:type="c:ReportParameterType">
            <rext:from xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="xsd:dateTime">2018-10-25T00:00:00.000+02:00</rext:from>
            <rext:to xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="xsd:dateTime">2018-10-27T00:00:00.000+02:00</rext:to>
        </rext:reportParam>
    </extension>
    <ownerRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType">
        <!-- administrator -->
    </ownerRef>
    <executionStatus>runnable</executionStatus>
    <category>Report</category>
    <handlerUri>http://midpoint.evolveum.com/xml/ns/public/report/create/handler-3</handlerUri>
    <objectRef oid="00000000-0000-0000-0000-000000000009" relation="org:default" type="c:ReportType">
        <!-- Audit logs report -->
    </objectRef>
    <recurrence>single</recurrence>
    <binding>tight</binding>
    <threadStopAction>close</threadStopAction>
</task>

The result from the execution of the above command is:

HTTP/1.1 202
Location: http://localhost:8080/midpoint/ws/rest/tasks/cfd4220d-ee94-4430-9943-bc658abc9774
Date: Fri, 26 Oct 2018 00:03:59 GMT
Content-Length: 0

From the Location header we can determine the OID of the created task - i.e. cfd4220d-ee94-4430-9943-bc658abc9774 in this case.

Option 2: Using Report API from bulk action

For completeness, here we show how to invoke a report via REST service. We have again chosen audit log report with two parameters filled in (fromto).

run-report.bat
curl.exe --user administrator:5ecr3t -H "Content-Type: application/xml" -X POST "http://localhost:8080/midpoint/ws/rest/rpc/executeScript" -d @run-report.xml
run-report.xml
<?xml version="1.0"?>
<s:executeScript xmlns:s="http://midpoint.evolveum.com/xml/ns/public/model/scripting-3" xmlns:c="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:q="http://prism.evolveum.com/xml/ns/public/query-3">
    <s:pipeline>
        <s:search>
            <s:type>ReportType</s:type>
            <s:query>
                <q:filter>
                    <q:equal>
                        <!-- or use any other appropriate filter here, e.g. by OID -->
                        <q:path>name</q:path>
                        <q:value>Audit logs report</q:value>
                    </q:equal>
                </q:filter>
            </s:query>
        </s:search>
        <s:action>
            <s:type>execute-script</s:type>
            <s:parameter>
                <s:name>script</s:name>
                <c:value xsi:type="c:ScriptExpressionEvaluatorType">
                    <c:code>
                    import com.evolveum.midpoint.wf.impl.processes.common.*;
                    import com.evolveum.midpoint.report.api.*;
                    import com.evolveum.midpoint.task.api.*;
                    import com.evolveum.midpoint.schema.result.*;
                    import com.evolveum.midpoint.xml.ns._public.common.common_3.*;
                    import com.evolveum.midpoint.prism.*;
                    import javax.xml.namespace.*;
                    import com.evolveum.midpoint.util.*;
                    import com.evolveum.midpoint.prism.xml.*;
                    
                    reportManager = SpringApplicationContextHolder.getBean(ReportManager.class);
                    taskManager = SpringApplicationContextHolder.getBean(TaskManager.class);
                    result = new OperationResult('runReport');
                    task = taskManager.createTaskInstance('runReport');
                    task.setOwner(actor.asPrismObject());
                    
                    paramContainerDef = midpoint.prismContext.schemaRegistry.findContainerDefinitionByElementName(ReportConstants.REPORT_PARAMS_PROPERTY_NAME);
                    paramContainer = paramContainerDef.instantiate();
                    paramContainerValue = new ReportParameterType(midpoint.prismContext).asPrismContainerValue();
                    paramContainer.add(paramContainerValue);
                    
                    PARAM1_NAME = 'from';
                    PARAM1_TYPE = DOMUtil.XSD_DATETIME;         /* or e.g. XSD_STRING */ 
                    PARAM1_VALUE = XmlTypeConverter.createXMLGregorianCalendar('2018-10-25T00:00:00.000+02:00');

                    PARAM2_NAME = 'to';
                    PARAM2_TYPE = DOMUtil.XSD_DATETIME; 
                    PARAM2_VALUE = XmlTypeConverter.createXMLGregorianCalendar('2018-10-27T00:00:00.000+02:00');
                    
                    reportParam1 = new ReportParameterType(midpoint.prismContext);
                    paramDef1 = new PrismPropertyDefinitionImpl(new QName(ReportConstants.NS_EXTENSION, PARAM1_NAME), PARAM1_TYPE, midpoint.prismContext);
                    paramDef1.setDynamic(true);
                    paramDef1.setRuntimeSchema(true);
                    paramDef1.setMaxOccurs(1);
                    param1 = paramDef1.instantiate();
                    param1.addRealValue(PARAM1_VALUE);
                    paramContainerValue.add(param1);

                    reportParam2 = new ReportParameterType(midpoint.prismContext);
                    paramDef2 = new PrismPropertyDefinitionImpl(new QName(ReportConstants.NS_EXTENSION, PARAM2_NAME), PARAM2_TYPE, midpoint.prismContext);
                    paramDef2.setDynamic(true);
                    paramDef2.setRuntimeSchema(true);
                    paramDef2.setMaxOccurs(1);
                    param2 = paramDef2.instantiate();
                    param2.addRealValue(PARAM2_VALUE);
                    paramContainerValue.add(param2);
    
                    reportManager.runReport(input.asPrismObject(), paramContainer, task, result);
                    return task.taskPrismObject.asObjectable();
                    </c:code>
                </c:value>
            </s:parameter>
            <s:parameter>
                <s:name>outputItem</s:name>
                <c:value>TaskType</c:value>
            </s:parameter>
        </s:action>
    </s:pipeline>
</s:executeScript> 

The above bulk action (needs to be run under administrator privileges) creates a task that creates the report. It returns the task, as can be seen from the invocation:

<t:object xmlns:t="http://prism.evolveum.com/xml/ns/public/types-3" xmlns="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:apti="http://midpoint.evolveum.com/xml/ns/public/common/api-types-3" xmlns:c="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:icfs="http://midpoint.evolveum.com/xml/ns/public/connector/icf-1/resource-schema-3" xmlns:org="http://midpoint.evolveum.com/xml/ns/public/common/org-3" xmlns:q="http://prism.evolveum.com/xml/ns/public/query-3" xmlns:ri="http://midpoint.evolveum.com/xml/ns/public/resource/instance-3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="apti:ExecuteScriptResponseType">
    <apti:output xmlns:s="http://midpoint.evolveum.com/xml/ns/public/model/scripting-3">
        <s:dataOutput>
            <s:item>
                <s:value oid="845278af-3225-45da-9834-b2153630b4b8" version="0" xsi:type="c:TaskType">
                    <name>Task 1540511302475-0-1</name>
                    <extension xmlns:rext="http://midpoint.evolveum.com/xml/ns/public/report/extension-3" xsi:type="c:ExtensionType">
                        <rext:reportParam xsi:type="c:ReportParameterType">
                            <rext:from xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="xsd:dateTime">2018-10-25T00:00:00.000+02:00</rext:from>
                            <rext:to xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="xsd:dateTime">2018-10-27T00:00:00.000+02:00</rext:to>
                        </rext:reportParam>
                    </extension>
                    <taskIdentifier>1540511302475-0-1</taskIdentifier>
                    <ownerRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType">
                        <targetName>administrator</targetName>
                    </ownerRef>
                    <executionStatus>runnable</executionStatus>
                    <category>Report</category>
                    <handlerUri>http://midpoint.evolveum.com/xml/ns/public/report/create/handler-3</handlerUri>
                    <result>
                        <operation>runReport</operation>
                        <status>in_progress</status>
                        <token>1000000000000010751</token>
                    </result>
                    <resultStatus>in_progress</resultStatus>
                    <objectRef oid="00000000-0000-0000-0000-000000000009" relation="org:default" type="c:ReportType"/>
                    <progress>0</progress>
                    <recurrence>single</recurrence>
                    <binding>tight</binding>
                    <schedule/>
                    <threadStopAction>close</threadStopAction>
                </s:value>
                <s:result>
                    <operation>com.evolveum.midpoint.model.impl.scripting.ScriptingExpressionEvaluator.process</operation>
                    <status>success</status>
                    <token>1000000000000010762</token>
                    <partialResults>
                        <operation>com.evolveum.midpoint.model.impl.scripting.actions.ScriptExecutor.execute</operation>
                        <status>success</status>
                        <params>
                            <entry key="value">
                                <paramValue>POV:report:00000000-0000-0000-0000-000000000009(Audit logs report)</paramValue>
                            </entry>
                        </params>
                        <token>1000000000000010763</token>
                    </partialResults>
                </s:result>
            </s:item>
        </s:dataOutput>
        <s:consoleOutput>Executed script on report:00000000-0000-0000-0000-000000000009(Audit logs report)</s:consoleOutput>
    </apti:output>
    <apti:result>
        <operation>com.evolveum.midpoint.model.impl.ModelRestService.executeScript</operation>
        <status>success</status>
        <token>1000000000000010750</token>
        ...
     </apti:result>
</t:object>

We can learn the OID of the created task (845278af-3225-45da-9834-b2153630b4b8) from the returned XML structure; namely from t:object/apti:output/s:dataOutput/s:item/s:value/@oid.

How to retrieve the report output

We can periodically check for the task completion, e.g. like this

curl.exe --user administrator:5ecr3t -H "Content-Type: application/xml" -X GET "http://localhost:8080/midpoint/ws/rest/tasks/cfd4220d-ee94-4430-9943-bc658abc9774"

Note that we have to supply correct task OID here.

The result is like this:

<task xmlns="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:c="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:icfs="http://midpoint.evolveum.com/xml/ns/public/connector/icf-1/resource-schema-3" xmlns:org="http://midpoint.evolveum.com/xml/ns/public/common/org-3" xmlns:q="http://prism.evolveum.com/xml/ns/public/query-3" xmlns:ri="http://midpoint.evolveum.com/xml/ns/public/resource/instance-3" xmlns:t="http://prism.evolveum.com/xml/ns/public/types-3" oid="cfd4220d-ee94-4430-9943-bc658abc9774" version="6">
    <name>Run audit log report</name>
    <extension xmlns:rext="http://midpoint.evolveum.com/xml/ns/public/report/extension-3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="c:ExtensionType">
        <rext:reportParam xsi:type="c:ReportParameterType">
            <rext:from xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="xsd:dateTime">2018-10-25T00:00:00.000+02:00</rext:from>
            <rext:to xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="xsd:dateTime">2018-10-27T00:00:00.000+02:00</rext:to>
        </rext:reportParam>
        <rext:reportOutputOid>5cf5b277-f867-45e3-a9e0-4f8eccdaa55c</rext:reportOutputOid>
    </extension>
    <metadata>
        <requestTimestamp>2018-10-26T02:03:59.351+02:00</requestTimestamp>
        <requestorRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType"/>
        <createTimestamp>2018-10-26T02:03:59.356+02:00</createTimestamp>
        <creatorRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType"/>
        <createChannel>http://midpoint.evolveum.com/xml/ns/public/model/channels-3#rest</createChannel>
    </metadata>
    <operationExecution id="1">
        <timestamp>2018-10-26T02:03:59.369+02:00</timestamp>
        <operation>
            <objectDelta>
                <t:changeType>add</t:changeType>
                <t:objectType>c:TaskType</t:objectType>
            </objectDelta>
            <executionResult>
                <operation>com.evolveum.midpoint.model.impl.lens.ChangeExecutor.executeDelta</operation>
                <status>success</status>
                <token>1000000000000011091</token>
            </executionResult>
            <objectName>Run audit log report</objectName>
        </operation>
        <status>success</status>
        <initiatorRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType"/>
        <channel>http://midpoint.evolveum.com/xml/ns/public/model/channels-3#rest</channel>
    </operationExecution>
    <taskIdentifier>1540512239357-0-1</taskIdentifier>
    <ownerRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType">
        <targetName>administrator</targetName>
    </ownerRef>
    <executionStatus>closed</executionStatus>
    <category>Report</category>
    <handlerUri>http://midpoint.evolveum.com/xml/ns/public/report/create/handler-3</handlerUri>
    <resultStatus>success</resultStatus>
    <objectRef oid="00000000-0000-0000-0000-000000000009" relation="org:default" type="c:ReportType"/>
    <lastRunStartTimestamp>2018-10-26T02:03:59.367+02:00</lastRunStartTimestamp>
    <lastRunFinishTimestamp>2018-10-26T02:04:03.777+02:00</lastRunFinishTimestamp>
    <completionTimestamp>2018-10-26T02:04:03.790+02:00</completionTimestamp>
    <progress>0</progress>
    <operationStats>
        <environmentalPerformanceInformation>
            <provisioningStatistics/>
            <mappingsStatistics/>
            <notificationsStatistics/>
        </environmentalPerformanceInformation>
        <timestamp>2018-10-26T02:04:03.777+02:00</timestamp>
        <liveInformation>false</liveInformation>
    </operationStats>
    <recurrence>single</recurrence>
    <binding>tight</binding>
    <threadStopAction>close</threadStopAction>
</task>

The <rext:reportOutputOid>5cf5b277-f867-45e3-a9e0-4f8eccdaa55c</rext:reportOutputOid> element tells us about the resulting report output.

We can retrieve it like this:

curl.exe --user administrator:5ecr3t -H "Content-Type: application/xml" -X GET "http://localhost:8080/midpoint/ws/rest/reportOutputs/5cf5b277-f867-45e3-a9e0-4f8eccdaa55c"

(again, please supply correct report output OID there)

The result is like this:

<reportOutput xmlns="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:c="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:icfs="http://midpoint.evolveum.com/xml/ns/public/connector/icf-1/resource-schema-3" xmlns:org="http://midpoint.evolveum.com/xml/ns/public/common/org-3" xmlns:q="http://prism.evolveum.com/xml/ns/public/query-3" xmlns:ri="http://midpoint.evolveum.com/xml/ns/public/resource/instance-3" xmlns:t="http://prism.evolveum.com/xml/ns/public/types-3" oid="5cf5b277-f867-45e3-a9e0-4f8eccdaa55c" version="1">
    <name>Audit logs report 26-10-2018 02-04-03 - html</name>
    <description>Report made from audit records. - html</description>
    <metadata>
        <requestTimestamp>2018-10-26T02:04:03.691+02:00</requestTimestamp>
        <requestorRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType"/>
        <createTimestamp>2018-10-26T02:04:03.696+02:00</createTimestamp>
        <creatorRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType"/>
        <createTaskRef oid="cfd4220d-ee94-4430-9943-bc658abc9774" relation="org:default" type="c:TaskType"/>
    </metadata>
    <operationExecution id="1">
        <timestamp>2018-10-26T02:04:03.766+02:00</timestamp>
        <operation>
            <objectDelta>
                <t:changeType>add</t:changeType>
                <t:objectType>c:ReportOutputType</t:objectType>
            </objectDelta>
            <executionResult>
                <operation>com.evolveum.midpoint.model.impl.lens.ChangeExecutor.executeDelta</operation>
                <status>success</status>
                <token>1000000000000011112</token>
            </executionResult>
            <objectName>Audit logs report 26-10-2018 02-04-03 - html</objectName>
        </operation>
        <status>success</status>
        <initiatorRef oid="00000000-0000-0000-0000-000000000002" relation="org:default" type="c:UserType"/>
        <taskRef oid="cfd4220d-ee94-4430-9943-bc658abc9774" relation="org:default" type="c:TaskType"/>
    </operationExecution>
    <filePath>C:/midpoint/home/scratch/export/Audit logs report 26-10-2018 02-04-03.html</filePath>
    <exportType>html</exportType>
    <reportRef oid="00000000-0000-0000-0000-000000000009" relation="org:default" type="c:ReportType"/>
    <nodeRef oid="c5d9559c-2f4b-4fab-921c-3067e91a8b4f" relation="org:default" type="c:NodeType"/>
</reportOutput>

You can now fetch the file (i.e. C:/midpoint/home/scratch/export/Audit logs report 26-10-2018 02-04-03.html) via OS-specific means. In the future we might add REST method to fetch the file using this mechanism.

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