Added Features REST API resource

This will help us track whether or not a server has a feature
either offered or enabled.  Ultimately, it could be used by
an admin to enable or disable features.

The Java client is not included in this commit.  Will add in
a subsequent commit.

1 files changed, 66 insertions, 0 deletions

diff --git a/base/server/cms/src/org/dogtagpki/server/rest/FeatureService.java b/base/server/cms/src/org/dogtagpki/server/rest/FeatureService.java
new file mode 100644
index 000000000..0361d6b0a
--- /dev/null
+++ b/base/server/cms/src/org/dogtagpki/server/rest/FeatureService.java
@@ -0,0 +1,66 @@
+package org.dogtagpki.server.rest;
+
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Map;
+
+import javax.ws.rs.core.GenericEntity;
+import javax.ws.rs.core.Response;
+
+import com.netscape.certsrv.apps.CMS;
+import com.netscape.certsrv.base.EBaseException;
+import com.netscape.certsrv.base.IConfigStore;
+import com.netscape.certsrv.base.PKIException;
+import com.netscape.certsrv.base.ResourceNotFoundException;
+import com.netscape.certsrv.system.Feature;
+import com.netscape.certsrv.system.FeatureResource;
+import com.netscape.cms.servlet.base.PKIService;
+
+public class FeatureService extends PKIService implements FeatureResource {
+    IConfigStore cs;
+
+    @Override
+    public Response listFeatures() {
+        IConfigStore cs = CMS.getConfigStore().getSubStore("features");
+        ArrayList<Feature> features = new ArrayList<Feature>();
+        Enumeration<String> tags = cs.getSubStoreNames();
+        while (tags.hasMoreElements()) {
+            String tag = tags.nextElement();
+            Feature feature = createFeature(cs, tag);
+            features.add(feature);
+        }
+        GenericEntity<List<Feature>> entity = new GenericEntity<List<Feature>>(features) {};
+        return Response.ok(entity).build();
+    }
+
+    @Override
+    public Response getFeature(String id) {
+        IConfigStore cs = CMS.getConfigStore().getSubStore("features");
+        Enumeration<String> tags = cs.getSubStoreNames();
+        while(tags.hasMoreElements()) {
+            String tag = tags.nextElement();
+            if (tag.equals(id)) {
+                Feature feature = createFeature(cs, tag);
+                return createOKResponse(feature);
+            }
+        }
+
+        throw new ResourceNotFoundException("Feature " + id + " not supported");
+    }
+
+    private Feature createFeature(IConfigStore cs, String tag) {
+        Map<String, String> props;
+        try {
+            props = cs.getSubStore(tag).getProperties();
+            Feature feature = new Feature();
+            feature.setId(tag);
+            feature.setEnabled(props.getOrDefault("enabled", "false"));
+            feature.setDescription(props.getOrDefault("description", ""));
+            feature.setVersion(props.getOrDefault("version", ""));
+            return feature;
+        } catch (EBaseException e) {
+            throw new PKIException(e);
+        }
+    }
+}