Contents
This sample demonstrates the usage of the TIBCO StreamBase® CSV File Writer Adapter for Apache HDFS.
You must open the sample application, CVSWriterTest.sbapp
and select the Parameters
tab and edit the HDFS_FILE_PATH
and HDFS_USER
to represent your current HDFS setup and where you would like to store the sample data.
-
In the Package Explorer, double-click to open the
CVSWriterTest.sbapp
application. Make sure the application is the currently active tab in the EventFlow Editor. -
Click the Run button. This opens the SB Test/Debug perspective and starts the application.
-
Select the Manual Input tab.
-
Enter the value
10
for a and press . -
Press F9 or click the Stop Running Application button.
-
The file specified in the HDFS_FILE_PATH parameter value should now contain tuples formatted as shown in this example:
a,b,Timestamp 10,100,2013-06-15 22:48:44.502-0400
you will need to use an HDFS file browser (such as Hue) to open the file from your HDFS file system to view this information.
This section describes how to run the sample in UNIX terminal windows or Windows command prompt windows. On Windows, be sure to use the StreamBase Command Prompt from the Start menu as described in the Test/Debug Guide, not the default command prompt.
-
Open two terminal windows on UNIX, or two StreamBase Command Prompts on Windows. In each window, navigate to the directory where the sample is installed, or to your workspace copy of the sample, as described above.
-
In window 1, run
sbd CSVWriterTest.sbapp
. -
In window 2, run
sbc enqueue InputStream1 < inputstream.dat
-
In window 2, run
sbadmin shutdown
to shut down the server. -
Look for the file specified in the
HDFS_FILE_PATH
parameter value by using an HDFS file browser such as Hue.
In StreamBase Studio, import this sample with the following steps:
-
From the top menu, click
→ . -
Select this sample from the Embedded Adapters list.
-
Click OK.
StreamBase Studio creates a single project containing the sample files.
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_hdfscsvwriter
See Default Installation Directories for the default location of studio-workspace
on your system.
In the default TIBCO StreamBase installation, this sample's files are initially installed in:
streambase-install-dir
/sample/hdfscsvwriter
See Default Installation Directories for the default location of studio-workspace
on your system.