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Apache OfBiz Cookbook

Apache OfBiz Cookbook

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Apache OfBiz Cookbook

Apache OfBiz Cookbook

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Overview of this book

Apache Open For Business (OFBiz) is an enterprise resource planning (ERP) system that provides a common data model and an extensive set of business processes. But without proper guidance on developing performance-critical applications, it is easy to make the wrong design and technology decisions. The power and promise of Apache OFBiz is comprehensively revealed in a collection of self-contained, quick, practical recipes in this Cookbook. This book covers a range of topics from initial system setup to web application and HTML page creation, Java development, and data maintenance tasks. Focusing on a series of the most commonly performed OFBiz tasks, it provides clear, cogent, and easy-to-follow instructions designed to make the most of your OFBiz experience. Let this book be your guide to enhancing your OFBiz productivity by saving you valuable time. Written specifically to give clear and straightforward answers to the most commonly asked OFBiz questions, this compendium of OFBiz recipes will show you everything you need to know to get things done in OFBiz. Whether you are new to OFBiz or an old pro, you are sure to find many useful hints and handy tips here. Topics range from getting started to configuration and system setup, security and database management through the final stages of developing and testing new OFBiz applications.
Table of Contents (15 chapters)
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Apache OFBiz Cookbook
Credits
About the Author
About the Reviewers
Preface

Using the automatic sequence generator


Many modern data-driven applications use automatic sequence generators to create primary keys for new database records. OFBiz provides a handy tool to acquire the next unique sequence identifier for any entity using the GenericDelegator object's sequence generator methods.

For example, to add a record with a unique primary key to the Recipe table, we could use the OFBiz sequence generator as shown in the following code snippet to find the next sequenceId for the Recipe entity, and then add a GenericValue with that sequenceId set as the primary key:

String sequenceId = delegator.getNextSeqId("Recipe");
GenericValue genericValue = delegator.makeValue("Recipe",
UtilMisc.toMap("recipeId",sequenceId));
// Or we could do it like this:
GenericValue genericValue = delegator.makeValue("Recipe",
UtilMisc.toMap("recipeId",delegator.getNextSeqId("Recipe")));
// Finish adding field values to genericValue and then store
// it in the database

OFBiz keeps track of sequence identifiers, and each time one is requested, it calculates a unique sequence value based on the name of the sequence passed. An easy way to keep sequences unique for entities is to pass the name of the entity as the sequence name. In that way, all calls to the same entity will use the same sequence.

Note

Note: for performance reasons, all primary keys for OFBiz data model entities default to twenty text characters or less. Using the GenericDelegator object's getNextSeqId method with a target entity ensures that you get a properly formatted Java data types (String or otherwise) for use as a primary key for that entity.

You may use the OFBiz sequence generator to return guaranteed unique values, including numeric values, for any purpose. For example, to create a Java Long unique sequence value, use a GenericDelegator method call similar to the following:

Long someSequenceNumber = getNextSeqIdLong('SequenceName');

Where SequenceName is any sequence name. If the named sequence does not exist, it will be created automatically.

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