[CASSANDRA-21295][trunk] Avoid unit conversion in DatabaseDescriptor.getMaxValueSize() for every deserializing Cell

src/java/org/apache/cassandra/config/DataStorageSpec.java

@@ -170,6 +170,8 @@ public String toString()
      */
     public final static class LongBytesBound extends DataStorageSpec
     {
+        private final long bytes;
+
         /**
          * Creates a {@code DataStorageSpec.LongBytesBound} of the specified amount.
          *
@@ -178,6 +180,7 @@ public final static class LongBytesBound extends DataStorageSpec
         public LongBytesBound(String value)
         {
             super(value, BYTES, Long.MAX_VALUE);
+            bytes = unit().toBytes(quantity());
         }
 
         /**
@@ -189,6 +192,7 @@ public LongBytesBound(String value)
         public LongBytesBound(long quantity, DataStorageUnit unit)
         {
             super(quantity, unit, BYTES, Long.MAX_VALUE, quantity + unit.symbol);
+            bytes = unit().toBytes(quantity());
         }
 
         /**
@@ -206,7 +210,7 @@ public LongBytesBound(long bytes)
          */
         public long toBytes()
         {
-            return unit().toBytes(quantity());
+            return bytes;
         }
 
         /**
@@ -225,6 +229,8 @@ public int toMebibytesInt()
      */
     public final static class IntBytesBound extends DataStorageSpec
     {
+        private final int bytes;
+
         /**
          * Creates a {@code DataStorageSpec.IntBytesBound} of the specified amount.
          *
@@ -233,6 +239,7 @@ public final static class IntBytesBound extends DataStorageSpec
         public IntBytesBound(String value)
         {
             super(value, BYTES, Integer.MAX_VALUE);
+            bytes = Ints.saturatedCast(unit().toBytes(quantity()));
         }
 
         /**
@@ -244,6 +251,7 @@ public IntBytesBound(String value)
         public IntBytesBound(long quantity, DataStorageUnit unit)
         {
             super(quantity, unit, BYTES, Integer.MAX_VALUE, quantity + unit.symbol);
+            bytes = Ints.saturatedCast(unit().toBytes(quantity()));
         }
 
         /**
@@ -263,7 +271,7 @@ public IntBytesBound(long bytes)
          */
         public int toBytes()
         {
-            return Ints.saturatedCast(unit().toBytes(quantity()));
+            return bytes;
         }
     }
 
@@ -274,6 +282,8 @@ public int toBytes()
      */
     public final static class IntKibibytesBound extends DataStorageSpec
     {
+        private final int bytes;
+
         /**
          * Creates a {@code DataStorageSpec.IntKibibytesBound} of the specified amount.
          *
@@ -282,6 +292,7 @@ public final static class IntKibibytesBound extends DataStorageSpec
         public IntKibibytesBound(String value)
         {
             super(value, KIBIBYTES, Integer.MAX_VALUE);
+            bytes = Ints.saturatedCast(unit().toBytes(quantity()));
         }
 
         /**
@@ -293,6 +304,7 @@ public IntKibibytesBound(String value)
         public IntKibibytesBound(long quantity, DataStorageUnit unit)
         {
             super(quantity, unit, KIBIBYTES, Integer.MAX_VALUE, quantity + unit.symbol);
+            bytes = Ints.saturatedCast(unit().toBytes(quantity()));
         }
 
         /**
@@ -312,7 +324,7 @@ public IntKibibytesBound(long kibibytes)
          */
         public int toBytes()
         {
-            return Ints.saturatedCast(unit().toBytes(quantity()));
+            return bytes;
         }
 
         /**
@@ -341,6 +353,8 @@ public long toBytesInLong()
      */
     public final static class LongMebibytesBound extends DataStorageSpec
     {
+        private final long bytes;
+
         /**
          * Creates a {@code DataStorageSpec.LongMebibytesBound} of the specified amount.
          *
@@ -349,6 +363,7 @@ public final static class LongMebibytesBound extends DataStorageSpec
         public LongMebibytesBound(String value)
         {
             super(value, MEBIBYTES, Long.MAX_VALUE);
+            bytes = unit().toBytes(quantity());
         }
 
         /**
@@ -360,6 +375,7 @@ public LongMebibytesBound(String value)
         public LongMebibytesBound(long quantity, DataStorageUnit unit)
         {
             super(quantity, unit, MEBIBYTES, Long.MAX_VALUE, quantity + unit.symbol);
+            bytes = unit().toBytes(quantity());
         }
 
         /**
@@ -377,7 +393,7 @@ public LongMebibytesBound(long mebibytes)
          */
         public long toBytes()
         {
-            return unit().toBytes(quantity());
+            return bytes;
         }
 
         /**
@@ -404,6 +420,7 @@ public long toMebibytes()
      */
     public final static class IntMebibytesBound extends DataStorageSpec
     {
+        private final int bytes;
         /**
          * Creates a {@code DataStorageSpec.IntMebibytesBound} of the specified amount.
          *
@@ -412,6 +429,7 @@ public final static class IntMebibytesBound extends DataStorageSpec
         public IntMebibytesBound(String value)
         {
             super(value, MEBIBYTES, Integer.MAX_VALUE);
+            bytes = Ints.saturatedCast(unit().toBytes(quantity()));
         }
 
         /**
@@ -423,6 +441,7 @@ public IntMebibytesBound(String value)
         public IntMebibytesBound(long quantity, DataStorageUnit unit)
         {
             super(quantity, unit, MEBIBYTES, Integer.MAX_VALUE, quantity + unit.symbol);
+            bytes = Ints.saturatedCast(unit().toBytes(quantity()));
         }
 
         /**
@@ -442,7 +461,7 @@ public IntMebibytesBound(long mebibytes)
          */
         public int toBytes()
         {
-            return Ints.saturatedCast(unit().toBytes(quantity()));
+            return bytes;
         }
 
         /**

src/java/org/apache/cassandra/config/DatabaseDescriptor.java

@@ -2322,7 +2322,7 @@ public static int getMaxSecurityLabelLength()
 
     public static int getMaxValueSize()
     {
-        return Ints.saturatedCast(conf.max_value_size.toMebibytes() * 1024L * 1024);
+        return conf.max_value_size.toBytes();
     }
 
     public static void setMaxValueSize(int maxValueSizeInBytes)

test/unit/org/apache/cassandra/config/DataStorageSpecTest.java

@@ -49,7 +49,9 @@ public void testConversions()
         assertEquals(10240, new DataStorageSpec.LongMebibytesBound("10MiB").toKibibytes());
         assertEquals(1024 * 1024 * 1024, new DataStorageSpec.IntBytesBound("1GiB").toBytes());
         assertEquals(10240, new DataStorageSpec.IntKibibytesBound("10MiB").toKibibytes());
+        assertEquals(10 * 1024 * 1024, new DataStorageSpec.IntKibibytesBound("10MiB").toBytes());
         assertEquals(1024, new DataStorageSpec.IntMebibytesBound("1GiB").toMebibytes());
+        assertEquals(1024 * 1024 * 1024, new DataStorageSpec.IntMebibytesBound("1GiB").toBytes());
 
         assertEquals(10, new DataStorageSpec.LongBytesBound(10, BYTES).toBytes());
         assertEquals(10240, new DataStorageSpec.LongBytesBound(10, KIBIBYTES).toBytes());

test/unit/org/apache/cassandra/config/DatabaseDescriptorTest.java

@@ -1067,4 +1067,11 @@ else if (mode == Config.DiskAccessMode.auto)
                 assertThat(DatabaseDescriptor.getCommitLogWriteDiskAccessMode()).isEqualTo(mode);
         }
     }
+
+    @Test
+    public void testMaxValueSize()
+    {
+        Config config = DatabaseDescriptor.loadConfig();
+        Assert.assertEquals(config.max_value_size.toMebibytes() * 1024 * 1024, DatabaseDescriptor.getMaxValueSize());
+    }
 }