Contents
This sample illustrates the use of the Spotfire Streaming File System Adapter for Apache HDFS. The information provided in this guide walks you through the sample setup to run with your HDFS installation.
To access the required files, open the Sample.sbapp
file in the src/main/eventflow/ folder. Select the Parameters tab and edit the packageNameHDFS_FILE_PATH and HDFS_USER values to
represent your HDFS setup.
In StreamBase Studio, import this sample with the following steps:
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From the top-level menu, select >.
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Enter
hdfsto narrow the list of options. -
Select HDFS File System adapter from the Large Data Storage and Analysis category.
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Click .
StreamBase Studio creates a project for this sample.
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In the Project Explorer view, open the sample you just loaded.
If you see red marks on a project folder, wait a moment for the project to load its features.
If the red marks do not resolve themselves after a minute, select the project, right-click, and select > from the context menu.
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Open the
src/main/eventflow/folder.packageName -
Open the
Sample.sbappfile and click the
Run button. This opens the SB
Test/Debug perspective and starts the module.
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In the Manual Input view, select , and click to send the default tuple.
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In the Output Streams view, observe tuples emitted on the
WriteStatusoutput stream with information about the file open action. -
In the Manual Input view, select , click to send the default tuple.
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In the Output Streams view, observe tuples emitted on the
WriteStatusoutput stream with information about the file close action. -
In the Manual Input view, select , click to send the default tuple.
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In the Output Streams view, observe tuples emitted on the
DeleteStatusoutput stream with information about the file delete action. -
Press F9 or click the
Terminate EventFlow Fragment button.
When you load the sample into StreamBase® Studio, Studio copies the sample project's files to your Studio workspace, which is normally part of your home directory, with full access rights.
Important
Load this sample in StreamBase® Studio, and thereafter use the Studio workspace copy of the sample to run and test it, even when running from the command prompt.
Using the workspace copy of the sample avoids permission problems. The default workspace location for this sample is:
studio-workspace/sample_adapter_embedded_hdfs
See Default Installation
Directories for the default location of studio-workspace on your system.