Merge pull request #759 from bnfleb/issue753

Issue #753 verify if bdb is started before generating reports

engine/src/main/java/org/archive/crawler/reporting/HostsReport.java

@@ -76,6 +76,10 @@ public class HostsReport extends Report {
 	
 	@Override
     public void write(final PrintWriter writer, StatisticsTracker stats) {
+            if (!stats.bdb.isRunning()) {
+                writer.println("bdb not started");
+                return;
+            }
     	Collection<String> keys = null;
     	DisposableStoredSortedMap<Long, String> hd = null;
     	if (maxSortSize<0 || maxSortSize>stats.serverCache.hostKeys().size()) {

engine/src/main/java/org/archive/crawler/reporting/MimetypesReport.java

@@ -33,6 +33,10 @@ public class MimetypesReport extends Report {
 
     @Override
     public void write(PrintWriter writer, StatisticsTracker stats) {
+        if (!stats.bdb.isRunning()) {
+            writer.println("bdb not started");
+            return;
+        }
         // header
         writer.print("[#urls] [#bytes] [mime-types]\n");
         DisposableStoredSortedMap<Long,String> fd = stats.getReverseSortedCopy(stats.getFileDistribution());

engine/src/main/java/org/archive/crawler/reporting/ResponseCodeReport.java

@@ -32,6 +32,10 @@ public class ResponseCodeReport extends Report {
 
     @Override
     public void write(PrintWriter writer, StatisticsTracker stats) {
+        if (!stats.bdb.isRunning()) {
+            writer.println("bdb not started");
+            return;
+        }
         // header
         writer.print("[#urls] [rescode]\n");
         

engine/src/main/java/org/archive/crawler/reporting/SeedsReport.java

@@ -36,6 +36,11 @@ public class SeedsReport extends Report {
 
     @Override
     public void write(PrintWriter writer, StatisticsTracker stats) {
+        if (!stats.bdb.isRunning()) {
+            writer.println("bdb not started");
+            return;
+        }
+
         // Build header.
         writer.print("[code] [status] [seed] [redirect]\n");