[jira] [Created] (HBASE-20119) Introduce a pojo class to carry coprocessor information in order to make TableDescriptorBuilder accept multiple cp at once

["Chia-Ping Tsai (JIRA)" <ji...@apache.org>]

Chia-Ping Tsai created HBASE-20119:
--------------------------------------

             Summary: Introduce a pojo class to carry coprocessor information in order to make TableDescriptorBuilder accept multiple cp at once
                 Key: HBASE-20119
                 URL: https://issues.apache.org/jira/browse/HBASE-20119
             Project: HBase
          Issue Type: Task
            Reporter: Chia-Ping Tsai
            Assignee: Chia-Ping Tsai
             Fix For: 2.0.0


The way to add cp to TableDescriptorBuilder is shown below.
{code:java}
public TableDescriptorBuilder addCoprocessor(String className) throws IOException {
  return addCoprocessor(className, null, Coprocessor.PRIORITY_USER, null);
}

public TableDescriptorBuilder addCoprocessor(String className, Path jarFilePath,
        int priority, final Map<String, String> kvs) throws IOException {
  desc.addCoprocessor(className, jarFilePath, priority, kvs);
  return this;
}

public TableDescriptorBuilder addCoprocessorWithSpec(final String specStr) throws IOException {
  desc.addCoprocessorWithSpec(specStr);
  return this;
}{code}
When loading our config to create table with multiple cps, we have to write the ugly for-loop.
{code:java}
val builder = TableDescriptorBuilder.newBuilde(tableName)
  .setAAA()
  .setBBB()
cfs.map(cf => ColumnFamilyDescriptorBuilder.of(cf))
   .foreach(builder.addColumnFamily(_))
cps.foreach(builder.addCoprocessor(_))
admin.createTable(builder.build())

{code}
If we introduce a pojo to carry the cp data and add the method accepting multiple cps and cfs, it is easier to exercise the fluent interface of TableDescriptorBuilder
{code:java}
admin.createTable(TableDescriptorBuilder.newBuilde(tableName)
.addCoprocessor(cps.map(toHBaseCp).asJavaCollection)
.addColumnFamily(cf.map(toHBaseCf).asJavaCollection)
.setAAA()
.setBBB()
.build){code}
 

 



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