Changeset 213 for Evidence

Timestamp:

05/25/10 08:54:18 (15 years ago)

Author:

ogrimm

Message:

History read from file if not found in memory

Location:

Evidence

Files:

• DColl.cc (modified) (12 diffs)
• readme.txt (modified) (1 diff)

Evidence/DColl.cc

@@ -80 +80 @@
         void AddService(string);
         void RemoveService(string);
-        float FileSize(FILE *);
+        off_t FileSize(FILE *);
         FILE *OpenHistFile(string, const char *);
    
@@ -124 +124 @@
   DataSizeService = new DimService(SERVER_NAME "/DataSizekB", DataSizekB);
   
-  LogSizekB = FileSize(LogFile);
+  LogSizekB = FileSize(LogFile)/1024.0;
   LogSizeService = new DimService(SERVER_NAME "/LogSizekB", LogSizekB);
 
@@ -220 +220 @@
   // ====== Part A: Handle service subscriptions ===
   //
+  // Services are added here, removal only in constructor.
   
   // If service is DIS_DNS/SERVER_LIST, subscribe to all SERVICE_LIST services
@@ -225 +226 @@
         char *Token = strtok(Info->getString(), "+-!@");        
         while (Token != NULL) {
-          if (*Info->getString()=='+') AddService(string(Token)+"/SERVICE_LIST");
+          AddService(string(Token)+"/SERVICE_LIST"); // 'add' also for '-' and '!'
           Token = strtok(NULL, "|"); // Skip server IP address
           Token = strtok(NULL, "@");
@@ -240 +241 @@
           char *Type = strtok(NULL, "\n");
           if (Type == NULL) return; // for safety, should not happen
-      if (strstr(Type, "|CMD")==NULL && strstr(Type, "|RPC")==NULL) {
-            // Add or remove service
-            if (*Info->getString()=='+') AddService(Name);
-          }
+      if (strstr(Type, "|CMD")==NULL && strstr(Type, "|RPC")==NULL) AddService(Name); // 'add' also for '-' and '!'
           Name = strtok(NULL, "|");
         }
@@ -346 +344 @@
       fflush(DataFile); // not continuously to reduce load
 
-          DataSizekB = FileSize(DataFile);
+          DataSizekB = FileSize(DataFile)/1024.0;
           DataSizeService->updateService();
           DataSizeLastUpdate = time(NULL);
@@ -454 +452 @@
   // Update logfile size service
   if (time(NULL) - LogSizeLastUpdate > SizeUpdateDelay) {
-        LogSizekB = FileSize(LogFile);
+        LogSizekB = FileSize(LogFile)/1024.0;
         LogSizeService->updateService();
         LogSizeLastUpdate = time(NULL);
@@ -473 +471 @@
         }
   }
-  
-  // Default response
-  setData(NULL, 0);
+
+  // Try to open history file if not found in memory
+  FILE *File = OpenHistFile(getString(), "rb");
+  if (File == NULL) {
+    setData(NULL, 0);
+        return;
+  }
+
+  // Read history file
+  off_t Size = FileSize(File);
+  if (Size != -1) {
+        char *Buffer = new char [Size-sizeof(int)];
+        fseek(File, sizeof(int), SEEK_SET);
+        fread(Buffer, sizeof(char), Size-sizeof(int), File);
+        if (ferror(File) != 0) {
+          State(WARN, "Error reading history file '%s' in rpcHandler()", getString());
+          setData(NULL, 0);             // Default response
+        }
+        else setData((void *) Buffer, Size);
+        delete[] Buffer;
+  }
+  
+  if (fclose(File) != 0) State(WARN, "Error closing history file '%s' in rpcHandler()", getString());
 }
 
@@ -517 +535 @@
       fread(&New.Next, sizeof(New.Next), 1, File);
       fread(New.Buffer, sizeof(char), New.HistSize, File);
-      fclose(File);
+          if (ferror(File) != 0) State(WARN, "Error reading history file '%s' in AddService()", Name.c_str());
+      if (fclose(File) != 0) State(WARN, "Error closing history file '%s' in AddService()", Name.c_str());;
         }
   }
@@ -545 +564 @@
       fwrite(&(*E).Next, sizeof((*E).Next), 1, File);
       fwrite((*E).Buffer, sizeof(char), (*E).HistSize, File);
-      fclose(File);
+          if (ferror(File) != 0) State(WARN, "Error writing history file '%s' in RemoveService()", Name.c_str());
+      if (fclose(File) != 0) State(WARN, "Error closing history file '%s' in RemoveService()", Name.c_str());;
         }
         
@@ -558 +578 @@
 // Determine size of file in kB
 //
-float DataHandler::FileSize(FILE *File) {
+off_t DataHandler::FileSize(FILE *File) {
 
   struct stat FileStatus;
@@ -567 +587 @@
   }
 
-  return (float) FileStatus.st_size/1024;
+  return FileStatus.st_size;
 }
 

Evidence/readme.txt

@@ -28 +28 @@
                         When regular expression compiling results in error, State is set to ERROR, not
                         FATAL. The erroneous expression is ignored in the following.
-25/5/2010       Service history remains available if service itself become unavailable
+25/5/2010       Service history remains available if service itself become unavailable. If not
+                        yet in memory, reading from history file is tried. Improved error handling of
+                        history files.