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Using the interaction classification framework introduced in this chapter in Figure 2-11 as a guide, we observe the following four Application patterns and their variations for Process-focused Application Integration (also known as intra-enterprise integration):
Direct Connection Application pattern and its Message/Call Connection variations
Allows a single interaction from the source application to be adapted and transported to one target application
Broker Application pattern and its Router variation
Allows a single interaction from the source application to be switched, split, and joined to multiple target applications concurrently
Serial Process Application pattern and its Serial Workflow variation
Allows a single interaction from the source application to execute a series of interactions with multiple target applications
Parallel Process Application pattern and its Parallel Workflow variation
Allows a single interaction from the source application to concurrently execute multiple series of interactions with multiple target applications
These four Application patterns for Application Integration are summarized in Figure 2-12. One dimension shows support for concurrent interactions to multiple target applications in parallel. The other dimension shows support for non-concurrent interactions to multiple targets in series.
Figure 2-12: Classification of Process-focused Application Integration patterns
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