WebLogic SingletonService for High Availability Scenarios: Create Logic that Runs Only in One Node of a Cluster at a Time and Fails Over Other Cluster Node when Things go Wrong or Maintenance is Needed


I recently visited a Package Delivery Company Customer (SxxR) who needed to implement a logic consisting in a background thread scanning continuously a shared directory containing acknowledgement of receipts of shipments files that must be processed and then passed to another stage. How can we make this logic HA? The answer is SingletonService: runs only […]

More

Facing NoClassDefFoundError in WebLogic 12C


IHAC who developed an Angular JS to be deployed in WLS12.1.2. Life was good until someone noticed that this application must include Oracle BPM 11g client library bpmservices11.1.1.7.jar to connect successfully to a SOA/BPM infra. The problem is that BPM api doesn’t work in a fresh WLS12C domain you need to install OPSS services included […]

More

Upload files to Oracle Storage Cloud Service, Java basic example


Obtain connection information in your OPC subscription page: Download Oracle Storage Cloud SDK: http://www.oracle.com/technetwork/topics/cloud/downloads/cloud-service-java-sdk-2121032.html Create a java Class with the following code: package storageupload; import oracle.cloud.storage.*; import oracle.cloud.storage.model.*; import oracle.cloud.storage.exception.*; import java.io.*; import java.util.*; import java.net.*; public class UploadingSegmentedObjects {    public static void main(String[] args) {        try {            CloudStorageConfig myConfig = new […]

More

Complex Event Processing and Big Data in Aviation for Monitoring/Registering Critical Situations and Crashes


I’m guessing the suitability of leveraging CEV and Big Data to provide real time data in addition to the official “blackbox” registers installed in aircraft for obtaining critical information in case of crashes and critical situations. The costs incurred for locating the registers is likely to be very high, mainly when the plane falls down […]

More