- #Java serialization data version 5 how to#
- #Java serialization data version 5 serial#
- #Java serialization data version 5 code#
If you change the hard coded value in Button2's code to "tom" and push Button2 again, you should see 5 printed to the server console.Because of the in-memory nature of most Spark computations, Spark programs can be bottleneckedīy any resource in the cluster: CPU, network bandwidth, or memory. The first time you see 6 printed to the server console. You can deserialize the values by pushing Button2.
#Java serialization data version 5 serial#
If you change the hard-coded values to "bob" and default integer value in the serial to 5 and push Button1 again, then a second row is added. To populate the Objects table, push Button1 once and the values "tom" and 6 are written to it. Serial s = (Serial)invokeBusinessObject("getserarg", "tom") The pageActionPerformed event for Button2 is coded as follows: The pageActionPerformed event for Button1 is coded as follows: The page has two buttons on it (Button1 and Button2) called saveserarg and getserarg respectively. The rest of the code is in the invoked() method as follows:īyte buf = (byte)obj.getProperty("object") įor this example, a page is used to invoke the business objects. The getserarg business object expects it's parameter to be a String. It gets the serialized object in the Object column, deserializes it, and prints the value. It is passed a String which it uses as a name to lookup in the Objects table via an AgaData.
This object is used to get the data from the table and deserialize it. ObjectOutputStream oos = new ObjectOutputStream(baos) ("getParameter returns "+s) īyteArrayOutputStream baos = new ByteArrayOutputStream()
All of its code is in the invoked() method, as shown here: The name is a String and object is a Serial. The saveserarg expects a Hashtable with two entries keyed by name and object. The code uses ObjectOutputStream to save the object. It is passed a Hashtable from which it extracts the values and saves them in a row in the Objects table using an AgaData. This object is used to extract and save the data. The page calls the setInt() method to set a value to pass to the saveserarg business object, described in the next section. The methods are defined in the User Code as follows: It has one member variable and two methods. The table called Objects has these two columns: Two invoked business objects called getserarg and setserarg The example has the following components:
#Java serialization data version 5 how to#
The following example shows how to write a value to a database table called Objects, then how to deserialize it by calling AgoObjectInputStream. Otherwise you will experience problems loading the object classes. You can use the regular java.io.ObjectOutputStream to save the Object, but you must use an AgoObjectInputStream to deserialize it. If you need to de-serialize a SilverStream-specific object like a triggered or utility business object, a page, or a Hashtable that contains a utility business object, you should use the AgoObjectInputStream class instead of the standard Java ObjectInputStream. See the chapter on Business Object Basics in the Programmer's Guide Using AgoObjectInputStream to deserialize data
Using ObjectInputStream to serialize data How to use ObjectInputStream and AgoObjectInputStream to serialize and deserialize a business or utility object. Serializing and Deserializing Business Objects