The beanshell write the string 'hello' to a temporary file. The filepath to the temporary file is then passed to the Read_text_file service which reads the file and outputs the string 'hello'.
hello
File temp = File.createTempFile("taverna", "txt");
temp.deleteOnExit();
BufferedWriter writer = new BufferedWriter(new FileWriter(temp));
writer.write(content);
writer.close();
out = temp.getCanonicalPath();
content
out
net.sourceforge.taverna.scuflworkers.io.TextFileReader