URL Accessibility For Reports Sample

This sample explains how to create Accessible URLs for reports. You might also find the URL Accessibility For Searches Sample useful. We will be reusing the code of the Handler Sample and reusing logic of the Asset Models Sample in this example. This sample requires Apache Maven. See Installation Prerequisites for more information on downloading this.

Instructions

1. Navigate to GREG_HOME/ samples/handler/src to find the source code of the Handler Sample.

2. Add the following dependency to your POM file:

Project Object Model (POM) is an XML representation of a Maven project held in a file named pom.xml. You should find POM file by the name pom.xml inside GREG_HOME/ samples/handler/src.

<dependency>
    <groupId>org.wso2.carbon</groupId>
    <artifactId>org.wso2.carbon.governance.api</artifactId>
    <version>4.0.1</version>
</dependency>

3. Add a new Java Class named URIForReportHandler at

GREG_HOME/samples/handler/src/src/main/java/org/wso2/carbon/registry/samples/handler/URIForReportHandler.java with the following source:

package org.wso2.carbon.registry.samples.handler;
 
import org.wso2.carbon.governance.api.exception.GovernanceException;
import org.wso2.carbon.governance.api.generic.GenericArtifactFilter;
import org.wso2.carbon.governance.api.generic.GenericArtifactManager;
import org.wso2.carbon.governance.api.generic.dataobjects.GenericArtifact;
import org.wso2.carbon.governance.api.util.GovernanceUtils;
import org.wso2.carbon.registry.core.ActionConstants;
import org.wso2.carbon.registry.core.exceptions.RegistryException;
import org.wso2.carbon.registry.core.jdbc.handlers.Handler;
import org.wso2.carbon.registry.core.jdbc.handlers.RequestContext;
import org.wso2.carbon.registry.core.session.CurrentSession;
import org.wso2.carbon.registry.core.utils.RegistryUtils;
import org.wso2.carbon.user.core.UserStoreException;
 
import javax.xml.namespace.QName;
 
public class URIForReportHandler extends Handler {
 
    private String resourceServletPath;
 
    public void setRegistryURL(String registryURL) {
        resourceServletPath = registryURL + (registryURL.endsWith("/") ? "resource" : "/resource");
    }
 
    public void put(RequestContext requestContext) throws RegistryException {
        GovernanceUtils.setTenantGovernanceSystemRegistry(CurrentSession.getTenantId());
        GenericArtifactManager manager = new GenericArtifactManager(
                GovernanceUtils.getGovernanceSystemRegistry(null), "uri");
        String path = requestContext.getResourcePath().getPath();
        final String uri = resourceServletPath + path;
        GenericArtifact[] artifacts = manager.findGenericArtifacts(new GenericArtifactFilter() {
            public boolean matches(GenericArtifact artifact) throws GovernanceException {
                return uri.matches(artifact.getAttribute("overview_uri"));
            }
        });
 
        if (artifacts.length == 0) {
            GenericArtifact artifact =
                    manager.newGovernanceArtifact(new QName(RegistryUtils.getResourceName(path)));
            artifact.setAttribute("overview_type", "Generic");
            artifact.setAttribute("overview_uri", uri);
            manager.addGenericArtifact(artifact);
 
            try {
                CurrentSession.getUserRealm().getAuthorizationManager().authorizeRole(
                        "wso2.anonymous.role", path, ActionConstants.GET);
            } catch (UserStoreException e) {
                throw new RegistryException("Unable to set role authorizations", e);
            }
        }
    }
 
    public void delete(RequestContext requestContext) throws RegistryException {
        GovernanceUtils.setTenantGovernanceSystemRegistry(CurrentSession.getTenantId());
        GenericArtifactManager manager = new GenericArtifactManager(
                GovernanceUtils.getGovernanceSystemRegistry(null), "uri");
        String path = requestContext.getResourcePath().getPath();
        final String uri = resourceServletPath + path;
        GenericArtifact[] artifacts = manager.findGenericArtifacts(new GenericArtifactFilter() {
            public boolean matches(GenericArtifact artifact) throws GovernanceException {
                return uri.matches(artifact.getAttribute("overview_uri"));
            }
        });
 
        if (artifacts.length > 0) {
            manager.removeGenericArtifact(artifacts[0].getId());
 
            try {
                CurrentSession.getUserRealm().getAuthorizationManager().clearRoleAuthorization(
                        "wso2.anonymous.role", path, ActionConstants.GET);
            } catch (UserStoreException e) {
                throw new RegistryException("Unable to clear role authorizations", e);
            }
        }
    }
}

4. Compile the source code by running the following command inside GREG_HOME/ samples/handler/src:

mvn clean install

The command mvn clean install will trigger an Apache Maven Build in your command line. This requires you having installed Apache Maven. See Installation Prerequisites for more information on downloading this.

A successful run of Apache Maven will generate a report similar to the following:

5. Copy the GREG_HOME/ samples/handler/src/target/ org.wso2.carbon.registry.samples.handler-4.5.0.jar into GREG_HOME/repository/components/dropins.

6. Edit the registry.xml file which is in GREG_HOME/repository/conf folder and add the following XML snippet.

<handler class="org.wso2.carbon.registry.samples.handler.URIForReportHandler">
    <filter class="org.wso2.carbon.registry.core.jdbc.handlers.filters.URLMatcher">
        <property name="pattern">/_system/governance/reports/.*</property>
    </filter>
    <property name="registryURL">https://localhost:9443/registry</property>
</handler>