Various bug fixes for endpoints on the audit manager module

ace-am/
  - pass the correct ReportPolicy when removing Reporting
  - instead of throwing exceptions, send HTTP 400s when missing parameters (ListItemDetailsServlet, CollectionSummaryServlet, DuplicateReportServlet)
  - allow browsing of the report servlet when none are found for a collection

ace-am/src/main/java/edu/umiacs/ace/monitor/access/CollectionSummaryServlet.java

@@ -36,7 +36,9 @@ import edu.umiacs.ace.util.EntityManagerServlet;
 import org.apache.log4j.Logger;
 
 import javax.persistence.EntityManager;
+import javax.persistence.NoResultException;
 import javax.persistence.Query;
+import javax.persistence.TypedQuery;
 import javax.servlet.RequestDispatcher;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
@@ -47,7 +49,7 @@ import java.util.List;
 
 /**
  * Show the current status of a collection, listing any non-active files
- * 
+ *
  * @author toaster
  */
 public class CollectionSummaryServlet extends EntityManagerServlet {
@@ -63,15 +65,16 @@ public class CollectionSummaryServlet extends EntityManagerServlet {
     public static final String PAGE_COUNT = "count";
     public static final String PAGE_SESSION = "session";
 
-    /** 
+    /**
      * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
-     * @param request servlet request
+     *
+     * @param request  servlet request
      * @param response servlet response
      */
     @Override
-    protected void processRequest( HttpServletRequest request,
-            HttpServletResponse response, EntityManager em )
-            throws ServletException, IOException {
+    protected void processRequest(HttpServletRequest request,
+                                  HttpServletResponse response,
+                                  EntityManager em) throws ServletException, IOException {
         RequestDispatcher dispatch;
         long startid = getParameter(request, PARAM_START, 0);
         long topid = getParameter(request, PARAM_TOP, 0);
@@ -84,41 +87,47 @@ public class CollectionSummaryServlet extends EntityManagerServlet {
 
         // determine start
         String startquery = "";
-        if ( startid > 0 ) {
+        if (startid > 0) {
             startquery = "AND m.id > :id ";
-        } else if ( topid > 0 ) {
+        } else if (topid > 0) {
             startquery = "AND m.id < :id ";
         }
 
         // build query
 
-        Query q;
+        TypedQuery<MonitoredItem> q;
         Collection c = getCollection(request, em);
+        // todo: if null should we return all error'd items from the db?
+        // probably a bad idea for this servlet
+        if (c == null) {
+            response.sendError(400, "collectionid must be present!");
+            return;
+        }
+
         query += "m.parentCollection = :coll " + startquery;
-        q = em.createQuery(query);
+        q = em.createQuery(query, MonitoredItem.class);
         q.setParameter("coll", c);
 
         LOG.debug("query: " + query);
         // fill in start ids if necessary
-        if ( startid > 0 ) {
+        if (startid > 0) {
             q.setParameter("id", startid);
-        } else if ( topid > 0 ) {
+        } else if (topid > 0) {
             q.setParameter("id", topid);
         }
 
-        if ( count != -1 ) {
+        if (count != -1) {
             q.setMaxResults(count);
         }
         List<MonitoredItem> miList = q.getResultList();
-        if ( miList != null && miList.size() > 0 ) {
-            request.setAttribute(PAGE_NEXT,
-                    miList.get(miList.size() - 1).getId() + 1);
+        if (miList != null && miList.size() > 0) {
+            request.setAttribute(PAGE_NEXT, miList.get(miList.size() - 1).getId() + 1);
         }
 
-        if ( listOnly ) {
+        if (listOnly) {
             Writer writer = response.getWriter();
             response.setContentType("text/plain");
-            for ( MonitoredItem mi : miList ) {
+            for (MonitoredItem mi : miList) {
                 writer.write(mi.getState() + ":" + mi.getPath() + "\r\n");
             }
             return;
@@ -132,8 +141,7 @@ public class CollectionSummaryServlet extends EntityManagerServlet {
         csb.setTotalFiles(CollectionCountContext.getFileCount(c));
         csb.setActiveFiles(CollectionCountContext.getActiveCount(c));
         csb.setCorruptFiles(CollectionCountContext.getCorruptCount(c));
-        csb.setInvalidDigests(CollectionCountContext.getTokenMismatchCount(
-                c));
+        csb.setInvalidDigests(CollectionCountContext.getTokenMismatchCount(c));
         csb.setMissingFiles(CollectionCountContext.getMissingCount(c));
         csb.setMissingTokens(CollectionCountContext.getMissingTokenCount(c));
         csb.setTotalErrors(CollectionCountContext.getTotalErrors(c));
@@ -145,7 +153,7 @@ public class CollectionSummaryServlet extends EntityManagerServlet {
         request.setAttribute(PAGE_COLLECTION, csb);
         request.setAttribute(PAGE_COUNT, count);
 
-        if ( hasJson(request) ) {
+        if (hasJson(request)) {
             dispatch = request.getRequestDispatcher("report-json.jsp");
         } else {
             dispatch = request.getRequestDispatcher("report.jsp");
@@ -160,6 +168,11 @@ public class CollectionSummaryServlet extends EntityManagerServlet {
         Query q = em.createQuery(query);
         q.setParameter("c", c);
         q.setMaxResults(1);
-        return (Long) q.getSingleResult();
+        try {
+            return (Long) q.getSingleResult();
+        } catch (NoResultException e) {
+            LOG.warn("No sessions available for collection", e);
+            return null;
+        }
     }
 }

ace-am/src/main/java/edu/umiacs/ace/monitor/access/ListItemDetailsServlet.java

@@ -30,23 +30,24 @@
 // $Id$
 package edu.umiacs.ace.monitor.access;
 
-import edu.umiacs.ace.util.EntityManagerServlet;
+import edu.umiacs.ace.monitor.core.Collection;
 import edu.umiacs.ace.monitor.core.MonitoredItem;
 import edu.umiacs.ace.monitor.core.MonitoredItemManager;
-import edu.umiacs.ace.monitor.core.Collection;
+import edu.umiacs.ace.util.EntityManagerServlet;
 import edu.umiacs.util.Strings;
-import java.io.IOException;
-import java.util.Collections;
-import java.util.List;
+
 import javax.persistence.EntityManager;
 import javax.servlet.RequestDispatcher;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
 
 /**
  * List details for a file or directory
- * 
+ *
  * @author toaster
  */
 public final class ListItemDetailsServlet extends EntityManagerServlet {
@@ -56,30 +57,30 @@ public final class ListItemDetailsServlet extends EntityManagerServlet {
     private static final String PARAM_PATH = "itempath";
 
     @Override
-    protected void processRequest( HttpServletRequest request,
-            HttpServletResponse response, EntityManager em ) throws ServletException, IOException {
-
+    protected void processRequest(HttpServletRequest request,
+                                  HttpServletResponse response,
+                                  EntityManager em) throws ServletException, IOException {
         Collection coll = getCollection(request, em);
         String path = getParameter(request, PARAM_PATH, "");
         MonitoredItemManager mim = new MonitoredItemManager(em);
 
-        if ( coll == null ) {
-            throw new ServletException("No collection found");
+        if (coll == null) {
+            response.sendError(400, "collectionid must be present");
+            return;
         }
 
-        if ( Strings.isEmpty(path) ) {
-
-
+        if (Strings.isEmpty(path)) {
             request.setAttribute(PAGE_ITEMS, mim.getCollectionRoots(coll));
         } else {
             MonitoredItem item = mim.getItemByPath(path, coll);
-            if ( item == null ) {
-                throw new ServletException("No item for path " + path);
+            if (item == null) {
+                response.sendError(400, "No item for path " + path);
+                return;
             }
+
             List<MonitoredItem> childItems;
-            if ( item.isDirectory() ) {
-                childItems = mim.listChildren(item.getParentCollection(),
-                        item.getPath());
+            if (item.isDirectory()) {
+                childItems = mim.listChildren(item.getParentCollection(), item.getPath());
             } else {
                 childItems = Collections.emptyList();
             }
@@ -88,13 +89,12 @@ public final class ListItemDetailsServlet extends EntityManagerServlet {
         }
 
         RequestDispatcher dispatcher;
-        if ( hasJson(request) ) {
+        if (hasJson(request)) {
             dispatcher = request.getRequestDispatcher("listitem-json.jsp");
         } else {
             dispatcher = request.getRequestDispatcher("listitem.jsp");
         }
-        dispatcher.forward(request, response);
-
 
+        dispatcher.forward(request, response);
     }
 }

ace-am/src/main/java/edu/umiacs/ace/monitor/compare/DuplicateReportServlet.java

@@ -32,10 +32,17 @@
 package edu.umiacs.ace.monitor.compare;
 
 import edu.umiacs.ace.monitor.access.CollectionCountContext;
+import edu.umiacs.ace.monitor.core.Collection;
 import edu.umiacs.ace.util.EntityManagerServlet;
 import edu.umiacs.ace.util.PersistUtil;
-import edu.umiacs.ace.monitor.core.Collection;
 import edu.umiacs.sql.SQL;
+import org.apache.log4j.Logger;
+
+import javax.persistence.EntityManager;
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -46,15 +53,8 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
-import javax.persistence.EntityManager;
-import javax.servlet.RequestDispatcher;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import org.apache.log4j.Logger;
 
 /**
- *
  * @author toaster
  */
 public class DuplicateReportServlet extends EntityManagerServlet {
@@ -68,8 +68,9 @@ public class DuplicateReportServlet extends EntityManagerServlet {
     public static final String PAGE_TIME = "time";
 
     @Override
-    protected void processRequest( HttpServletRequest request,
-            HttpServletResponse response, EntityManager em ) throws ServletException, IOException {
+    protected void processRequest(HttpServletRequest request,
+                                  HttpServletResponse response,
+                                  EntityManager em) throws ServletException, IOException {
         Collection collection = null;
         RequestDispatcher dispatcher;
         Connection conn = null;
@@ -78,29 +79,29 @@ public class DuplicateReportServlet extends EntityManagerServlet {
 //        long totalFiles = 0;
 
         // digest, # instances of digest
-        Set<MyEntry> duplicateCount = new TreeSet<MyEntry>();
+        Set<MyEntry> duplicateCount = new TreeSet<>();
         // # digest instances, total over all digests
-        List<HistEntry> histogram = new ArrayList<HistEntry>();
+        List<HistEntry> histogram = new ArrayList<>();
 
         long collectionId = getParameter(request, PARAM_COLLECTION_ID, 0);
-        if ( collectionId > 0 ) {
+        if (collectionId > 0) {
             collection = em.getReference(Collection.class, collectionId);
 
             try {
                 conn = PersistUtil.getDataSource().getConnection();
                 PreparedStatement pst =
                         conn.prepareStatement(
-                        "SELECT monitored_item.FILEDIGEST, count(monitored_item.FILEDIGEST) "
-                        + "FROM monitored_item " + "WHERE monitored_item.PARENTCOLLECTION_ID = ? "
-                        + "GROUP BY monitored_item.FILEDIGEST HAVING COUNT(monitored_item.FILEDIGEST) > 1");
+                                "SELECT monitored_item.FILEDIGEST, count(monitored_item.FILEDIGEST) "
+                                        + "FROM monitored_item " + "WHERE monitored_item.PARENTCOLLECTION_ID = ? "
+                                        + "GROUP BY monitored_item.FILEDIGEST HAVING COUNT(monitored_item.FILEDIGEST) > 1");
                 pst.setLong(1, collectionId);
                 ResultSet rs = pst.executeQuery();
 
-                while ( rs.next() ) {
+                while (rs.next()) {
                     String hash = rs.getString(1);
                     int count = rs.getInt(2);
 //                    totalFiles += count;
-                    if ( count > 1 ) {
+                    if (count > 1) {
                         duplicateCount.add(new MyEntry(count, hash));
                         totalDups += count - 1;
                         increment(histogram, count);
@@ -110,13 +111,17 @@ public class DuplicateReportServlet extends EntityManagerServlet {
                 rs.close();
                 pst.close();
                 LOG.info("Duplicate report on " + collection.getName() + " time "
-                + (System.currentTimeMillis() - startTime) + " total dups " + totalDups);
+                        + (System.currentTimeMillis() - startTime) + " total dups " + totalDups);
 
-            } catch ( SQLException e ) {
+            } catch (SQLException e) {
                 throw new ServletException(e);
             } finally {
                 SQL.release(conn);
             }
+        } else {
+            // if there's no collectionid present, return with a bad request
+            response.sendError(400, "collectionid must be present");
+            return;
         }
 
         Collections.sort(histogram);
@@ -127,9 +132,9 @@ public class DuplicateReportServlet extends EntityManagerServlet {
         request.setAttribute(PAGE_LIST, duplicateCount);
         request.setAttribute(PAGE_HISTO, histogram);
         request.setAttribute(PAGE_TIME, (System.currentTimeMillis() - startTime));
-        
 
-        if ( hasJson(request) ) {
+
+        if (hasJson(request)) {
             dispatcher = request.getRequestDispatcher("duplicatereport-json.jsp");
         } else {
             dispatcher = request.getRequestDispatcher("duplicatereport.jsp");
@@ -137,9 +142,9 @@ public class DuplicateReportServlet extends EntityManagerServlet {
         dispatcher.forward(request, response);
     }
 
-    private void increment( List<HistEntry> map, int idx ) {
-        for ( HistEntry e : map ) {
-            if ( e.digestCount == idx ) {
+    private void increment(List<HistEntry> map, int idx) {
+        for (HistEntry e : map) {
+            if (e.digestCount == idx) {
                 e.instances++;
                 return;
             }
@@ -153,7 +158,7 @@ public class DuplicateReportServlet extends EntityManagerServlet {
         int digestCount;
         int instances;
 
-        private HistEntry( int digestCount ) {
+        private HistEntry(int digestCount) {
             this.digestCount = digestCount;
             this.instances = 1;
         }
@@ -175,26 +180,26 @@ public class DuplicateReportServlet extends EntityManagerServlet {
         }
 
         @Override
-        public boolean equals( Object obj ) {
-            if ( obj == null ) {
+        public boolean equals(Object obj) {
+            if (obj == null) {
                 return false;
             }
-            if ( getClass() != obj.getClass() ) {
+            if (getClass() != obj.getClass()) {
                 return false;
             }
             final HistEntry other = (HistEntry) obj;
-            if ( this.digestCount != other.digestCount ) {
+            if (this.digestCount != other.digestCount) {
                 return false;
             }
-            if ( this.instances != other.instances ) {
+            if (this.instances != other.instances) {
                 return false;
             }
             return true;
         }
 
         @Override
-        public int compareTo( HistEntry o ) {
-            if ( digestCount == o.digestCount ) {
+        public int compareTo(HistEntry o) {
+            if (digestCount == o.digestCount) {
                 return digestCount - o.digestCount;
             }
             return instances - o.instances;
@@ -206,7 +211,7 @@ public class DuplicateReportServlet extends EntityManagerServlet {
         int count;
         String digest;
 
-        private MyEntry( int count, String digest ) {
+        private MyEntry(int count, String digest) {
             this.count = count;
             this.digest = digest;
         }
@@ -220,26 +225,26 @@ public class DuplicateReportServlet extends EntityManagerServlet {
         }
 
         @Override
-        public boolean equals( Object obj ) {
-            if ( obj == null ) {
+        public boolean equals(Object obj) {
+            if (obj == null) {
                 return false;
             }
-            if ( getClass() != obj.getClass() ) {
+            if (getClass() != obj.getClass()) {
                 return false;
             }
             final MyEntry other = (MyEntry) obj;
-            if ( this.count != other.count ) {
-                return false;
-            }
-            if ( (this.digest == null) ? (other.digest != null) : !this.digest.equals(other.digest) ) {
+            if (this.count != other.count) {
                 return false;
             }
-            return true;
+
+            return (this.digest == null)
+                    ? (other.digest == null)
+                    : this.digest.equals(other.digest);
         }
 
         @Override
-        public int compareTo( MyEntry o ) {
-            if ( o.count != count ) {
+        public int compareTo(MyEntry o) {
+            if (o.count != count) {
                 return o.count - count;
             } else {
                 return o.digest.compareTo(digest);

ace-am/src/main/java/edu/umiacs/ace/monitor/core/Collection.java

@@ -199,6 +199,7 @@ public class Collection implements Serializable {
         return state.asChar();
     }
 
+    @JsonIgnore
     public CollectionState getStateEnum() {
         return state;
     }

ace-am/src/main/java/edu/umiacs/ace/monitor/reporting/ReportConfigurationServlet.java

@@ -31,11 +31,12 @@
 
 package edu.umiacs.ace.monitor.reporting;
 
-import edu.umiacs.ace.util.EntityManagerServlet;
 import edu.umiacs.ace.monitor.core.Collection;
+import edu.umiacs.ace.util.EntityManagerServlet;
 import edu.umiacs.util.Strings;
-import java.io.IOException;
-import java.text.ParseException;
+import org.apache.log4j.Logger;
+import org.quartz.CronExpression;
+
 import javax.persistence.EntityManager;
 import javax.persistence.EntityNotFoundException;
 import javax.persistence.EntityTransaction;
@@ -44,8 +45,8 @@ import javax.servlet.RequestDispatcher;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
-import org.apache.log4j.Logger;
-import org.quartz.CronExpression;
+import java.io.IOException;
+import java.text.ParseException;
 
 /**
  * Servlet to configure automated generation of ReportSummarys .
@@ -55,7 +56,6 @@ import org.quartz.CronExpression;
  * month = month list to run
  * day = day of month to run
  * reportid = id of existing to modify, if empty this will create a new one
- * 
  *
  * @author toaster
  */
@@ -76,54 +76,54 @@ public class ReportConfigurationServlet extends EntityManagerServlet {
             ReportConfigurationServlet.class);
 
     @Override
-    protected void processRequest( HttpServletRequest request,
-            HttpServletResponse response, EntityManager em ) throws ServletException, IOException {
-
-        long removeid = getParameter(request, PARAM_REMOVEID, 0);
+    protected void processRequest(HttpServletRequest request,
+                                  HttpServletResponse response,
+                                  EntityManager em) throws ServletException, IOException {
+        Collection coll;
         ReportPolicy rp = getReportPolicy(request, em);
-        Collection coll = null;
-        if ( rp != null ) {
+        long removeid = getParameter(request, PARAM_REMOVEID, 0);
+
+        if (rp != null) {
             coll = rp.getCollection();
         } else {
             coll = getCollection(request, em);
         }
 
-        if ( removeid > 0 ) {
-            ReportPolicy removePolicy = em.getReference(ReportPolicy.class,
-                    removeid);
-            
-            if ( removePolicy != null ) {
+        if (removeid > 0) {
+            ReportPolicy removePolicy = em.getReference(ReportPolicy.class, removeid);
+
+            if (removePolicy != null) {
                 LOG.debug("Removing report policy " + removePolicy.getName());
                 coll = removePolicy.getCollection();
                 EntityTransaction trans = em.getTransaction();
                 trans.begin();
                 try {
-                    SchedulerContextListener.removeJob(rp);
+                    SchedulerContextListener.removeJob(removePolicy);
                     em.remove(removePolicy);
                     trans.commit();
-                } catch ( Exception e ) {
+                } catch (Exception e) {
                     LOG.error("Error removing report", e);
                 }
             }
         } // are we saving a new or modifying existing
-        else if ( !Strings.isEmpty(request.getParameter(PARAM_SUBMIT)) ) {
+        else if (!Strings.isEmpty(request.getParameter(PARAM_SUBMIT))) {
 
             String name = getParameter(request, PARAM_NAME, null);
-            CronExpression ce = null;
+            CronExpression ce;
             try {
                 ce = extractCronString(request);
-            } catch ( Exception e ) {
+            } catch (Exception e) {
                 LOG.error("Bad regex", e);
                 throw new ServletException(e);
             }
             LOG.debug("Extracted cron string " + ce.getCronExpression());
 
-            if ( rp != null ) {
+            if (rp != null) {
 
-
-                if ( !Strings.isEmpty(name) ) {
+                if (!Strings.isEmpty(name)) {
                     rp.setName(name);
                 }
+
                 rp.setEmailList(getParameter(request, PARAM_EMAIL, null));
                 rp.setCronString(ce.getCronExpression());
                 EntityTransaction trans = em.getTransaction();
@@ -133,23 +133,22 @@ public class ReportConfigurationServlet extends EntityManagerServlet {
                     trans.commit();
                     SchedulerContextListener.removeJob(rp);
                     SchedulerContextListener.addJob(rp);
-                } catch ( Exception e ) {
+                } catch (Exception e) {
                     LOG.error("Error merging report", e);
                 }
 
             } else {
                 rp = new ReportPolicy();
                 // if name is null && months are null, do not persist
-                if ( Strings.isEmpty(name) ) {
+                if (Strings.isEmpty(name)) {
                     name = "unnamed";
                 }
 
                 rp.setName(name);
                 rp.setCronString(ce.getCronExpression());
                 rp.setEmailList(getParameter(request, PARAM_EMAIL, null));
-                if ( coll == null ) {
-                    throw new ServletException(
-                            "No collection included for report");
+                if (coll == null) {