GUACAMOLE-462: Allow individual records to be identified and retrieved directly.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/base/ModeledActivityRecord.java

@@ -100,6 +100,17 @@ public class ModeledActivityRecord implements ActivityRecord {
         return false;
     }
 
+    @Override
+    public String getIdentifier() {
+
+        Integer id = model.getRecordID();
+        if (id == null)
+            return null;
+
+        return id.toString();
+
+    }
+
     @Override
     public UUID getUUID() {
 

guacamole-ext/src/main/java/org/apache/guacamole/net/auth/ActivityRecord.java

@@ -78,6 +78,21 @@ public interface ActivityRecord extends ReadableAttributes {
      */
     public boolean isActive();
 
+    /**
+     * Returns the unique identifier assigned to this record, if any. If this
+     * record is not uniquely identifiable, this may be null. If provided, this
+     * unique identifier MUST be unique across all {@link ActivityRecord}
+     * objects within the same {@link ActivityRecordSet}.
+     *
+     * @return
+     *     The unique identifier assigned to this record, or null if this
+     *     record has no such identifier.
+     */
+    public default String getIdentifier() {
+        UUID uuid = getUUID();
+        return uuid != null ? uuid.toString() : null;
+    }
+
     /**
      * Returns a UUID that uniquely identifies this record. If provided, this
      * UUID MUST be deterministic and unique across all {@link ActivityRecord}

guacamole-ext/src/main/java/org/apache/guacamole/net/auth/ActivityRecordSet.java

@@ -57,6 +57,30 @@ public interface ActivityRecordSet<RecordType extends ActivityRecord> {
      */
     Collection<RecordType> asCollection() throws GuacamoleException;
 
+    /**
+     * Returns the record having the given unique identifier, if records within
+     * this set have unique identifiers. If records within this set do not have
+     * defined unique identifiers, this function has no effect.
+     *
+     * @param identifier
+     *     The unique identifier of the record to retrieve.
+     *
+     * @return
+     *     The record having the given unique identifier, or null if there is
+     *     no such record.
+     *
+     * @throws GuacamoleException
+     *     If an error occurs while retrieving the record.
+     */
+    default RecordType get(String identifier) throws GuacamoleException {
+        return asCollection().stream()
+                .filter((record) -> {
+                    String recordIdentifier = record.getIdentifier();
+                    return recordIdentifier != null && recordIdentifier.equals(identifier);
+                })
+                .findFirst().orElse(null);
+    }
+
     /**
      * Returns the subset of records which contain the given value. The
      * properties and semantics involved with determining whether a particular

guacamole-ext/src/main/java/org/apache/guacamole/net/auth/DecoratingActivityRecordSet.java

@@ -122,6 +122,17 @@ public abstract class DecoratingActivityRecordSet<RecordType extends ActivityRec
         };
     }
 
+    @Override
+    public RecordType get(String string) throws GuacamoleException {
+
+        RecordType record = super.get(string);
+        if (record != null)
+            return decorate(record);
+
+        return null;
+
+    }
+
     @Override
     public ActivityRecordSet<RecordType> sort(SortableProperty property,
             boolean desc) throws GuacamoleException {

guacamole-ext/src/main/java/org/apache/guacamole/net/auth/DelegatingActivityRecord.java

@@ -81,6 +81,11 @@ public class DelegatingActivityRecord implements ActivityRecord {
         return record.isActive();
     }
 
+    @Override
+    public String getIdentifier() {
+        return record.getIdentifier();
+    }
+
     @Override
     public UUID getUUID() {
         return record.getUUID();

guacamole-ext/src/main/java/org/apache/guacamole/net/auth/DelegatingActivityRecordSet.java

@@ -59,6 +59,11 @@ public class DelegatingActivityRecordSet<RecordType extends ActivityRecord>
         return recordSet;
     }
 
+    @Override
+    public RecordType get(String identifier) throws GuacamoleException {
+        return recordSet.get(identifier);
+    }
+
     @Override
     public Collection<RecordType> asCollection() throws GuacamoleException {
         return recordSet.asCollection();

guacamole/src/main/java/org/apache/guacamole/rest/history/APIActivityRecord.java

@@ -96,6 +96,7 @@ public class APIActivityRecord {
         this.remoteHost = record.getRemoteHost();
         this.username   = record.getUsername();
         this.active     = record.isActive();
+        this.identifier = record.getIdentifier();
         this.uuid       = record.getUUID();
         this.attributes = record.getAttributes();
 
@@ -164,6 +165,18 @@ public class APIActivityRecord {
         return active;
     }
 
+    /**
+     * Returns the unique identifier assigned to this record, if any. If this
+     * record is not uniquely identifiable, this may be null.
+     *
+     * @return
+     *     The unique identifier assigned to this record, or null if this
+     *     record has no such identifier.
+     */
+    public String getIdentifier() {
+        return identifier;
+    }
+
     /**
      * Returns a UUID that uniquely identifies this record. If not implemented
      * by the extension exposing this history record, this may be null.

guacamole/src/main/java/org/apache/guacamole/rest/history/ActivityRecordResource.java

@@ -19,7 +19,9 @@
 
 package org.apache.guacamole.rest.history;
 
+import java.util.function.Function;
 import javax.ws.rs.Consumes;
+import javax.ws.rs.GET;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
@@ -42,14 +44,37 @@ public class ActivityRecordResource {
      */
     private final ActivityRecord record;
 
+    /**
+     * The REST API object representing the ActivityRecord being exposed.
+     */
+    private final APIActivityRecord externalRecord;
+
     /**
      * Creates a new ActivityRecordResource which exposes the given record.
      *
      * @param record
      *     The ActivityRecord that should be exposed.
+     *
+     * @param externalRecord
+     *     The REST API object representing the ActivityRecord being exposed.
      */
-    public ActivityRecordResource(ActivityRecord record) {
+    public ActivityRecordResource(ActivityRecord record,
+            APIActivityRecord externalRecord) {
         this.record = record;
+        this.externalRecord = externalRecord;
+    }
+
+    /**
+     * Returns the record represented by this ActivityRecordResource, in a
+     * format intended for interchange.
+     *
+     * @return
+     *     The record that this ActivityRecordResource represents, in a format
+     *     intended for interchange.
+     */
+    @GET
+    public APIActivityRecord getRecord() {
+        return externalRecord;
     }
 
     /**

guacamole/src/main/java/org/apache/guacamole/rest/history/ActivityRecordSetResource.java

@@ -21,7 +21,6 @@ package org.apache.guacamole.rest.history;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.UUID;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.GET;
 import javax.ws.rs.Path;
@@ -29,7 +28,6 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
-import org.apache.guacamole.GuacamoleClientException;
 import org.apache.guacamole.GuacamoleException;
 import org.apache.guacamole.GuacamoleResourceNotFoundException;
 import org.apache.guacamole.net.auth.ActivityRecord;
@@ -176,70 +174,28 @@ public abstract class ActivityRecordSetResource<InternalRecordType extends Activ
     }
 
     /**
-     * Retrieves record having the given UUID from among the list of activity
+     * Retrieves record having the given identifier from among the set of
-     * records stored within the underlying ActivityRecordSet which match the
+     * activity records stored within the underlying ActivityRecordSet.
-     * given, arbitrary criteria. If specified, the returned records will also
-     * be sorted according to the given sort predicates. As the number of
-     * activity records retrieved at any given time may be limited by the
-     * extension providing those records, the sorting and search criteria may
-     * impact whether the record having a particular UUID can be located, even
-     * if it is known that the record exists.
      *
-     * @param uuid
+     * @param identifier
-     *     The UUID of the record to retrieve.
+     *     The unique identifier of the record to retrieve.
-     *
-     * @param requiredContents
-     *     The set of strings that each must occur somewhere within the
-     *     relevant records, whether within the associated username,
-     *     the name of some associated object (such as a connection), or any
-     *     associated date. If non-empty, any record not matching each of the
-     *     strings within the collection will not be considered.
-     *
-     * @param sortPredicates
-     *     A list of predicates to apply while sorting the relevant records,
-     *     describing the properties involved and the sort order for those
-     *     properties.
      *
      * @return
-     *     The record having the given UUID which matches the provided
+     *     A resource representing the record having the given identifier.
-     *     criteria.
      *
      * @throws GuacamoleException
-     *     If an error occurs while applying the given filter criteria or
+     *     If an error occurs while locating the requested record, or if the
-     *     sort predicates, or if the requested record cannot be found.
+     *     requested record cannot be found.
      */
-    @Path("{uuid}")
+    @Path("{identifier}")
-    public ActivityRecordResource getRecord(@PathParam("uuid") String uuid,
+    public ActivityRecordResource getRecord(@PathParam("identifier") String identifier)
-            @QueryParam("contains") List<String> requiredContents,
-            @QueryParam("order") List<APISortPredicate> sortPredicates)
                 throws GuacamoleException {
 
-        // Parse UUID from provided string
+        InternalRecordType record = history.get(identifier);
-        UUID parsedUUID;
+        if (record == null)
-        try {
+            throw new GuacamoleResourceNotFoundException("Not found: \"" + identifier + "\"");
-            parsedUUID = UUID.fromString(uuid);
-        }
-        catch (IllegalArgumentException e) {
-            throw new GuacamoleClientException("Invalid UUID.", e);
-        }
 
-        // Apply search/sort criteria
+        return new ActivityRecordResource(record, toExternalRecord(record));
-        applyCriteria(requiredContents, sortPredicates);
-        
-        // Locate record having given UUID among all visible records
-        for (InternalRecordType record : history.asCollection()) {
-
-            // Ignore records lacking any UUID
-            UUID recordUUID = record.getUUID();
-            if (recordUUID == null)
-                continue;
-
-            if (recordUUID.equals(parsedUUID))
-                return new ActivityRecordResource(record);
-
-        }
-
-        throw new GuacamoleResourceNotFoundException("No such history entry.");
 
     }