Configure the tAmazonEMRListInstances component and the tJava component to retrieve and display the ID and name information of all
instance groups in a running cluster.
Procedure
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Double-click the tAmazonEMRListInstances component to open its Basic settings view.
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In the Access Key and Secret Key fields, enter the authentication credentials
required to access Amazon S3.
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Select the AWS region from the Region
drop-down list. In this example, it is Asia Pacific
(Tokyo).
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Clear the Filter master and core
instances check box to list all instance groups, including the
Master, Core, and Task type instance groups.
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In the Cluster id field, enter the ID
of the cluster for which to list the instance groups. In this example, the returned
value of the global variable CLUSTER_FINAL_ID of the previous
tAmazonEMRManage component is used.
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Double-click the tJava component to
open its Basic settings view.
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In the Code field, enter the following
code to print the ID and Name information of each instance group in the
cluster.
System.out.println("\r\n===== Instance Group =====");
System.out.println("Instance Group ID: " + (String)globalMap.get("tAmazonEMRListInstances_1_CURRENT_GROUP_ID"));
System.out.println("Instance Group Name: " + (String)globalMap.get("tAmazonEMRListInstances_1_CURRENT_GROUP_NAME"));
