Examples of java.io.PrintWriter.checkError()

java.io.PrintWriter.checkError()
Answers a boolean indicating whether or not this PrintWriter has encountered an error. If so, the receiver should probably be closed since further writes will not actually take place. A side effect of calling checkError is that the target Writer is flushed. @return boolean has an error occurred in this PrintWriter.


            // Print the file epilog
            writer.println("</database>");


            // Check for errors that occurred while printing
            if (writer.checkError()) {
                writer.close();
                fileNew.delete();
                throw new IOException
                    ("Saving database to '" + pathname + "'");
            }

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            wri = new PrintWriter(new OutputStreamWriter(out, "UTF8"));
            wri.write("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n");
            (new DOMElementWriter()).write(doc.getDocumentElement(), wri, 0, "  ");
            wri.flush();
            // writers do not throw exceptions, so check for them.
            if (wri.checkError()) {
                throw new IOException("Error while writing DOM content");
            }
        } finally {
            if (wri != null) {
                wri.close();

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                log.error(ioe.getMessage(), ioe);
            } finally {
                if(writer != null) {
                    writer.close();
                    
                    if(writer.checkError()) {
                         log.error("An error occured whilst writting the RESTXQ registry file: " + fNewRegistry);
                    }
                }
            }

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            // Print the file epilog
            writer.println("</tomcat-users>");


            // Check for errors that occurred while printing
            if (writer.checkError()) {
                writer.close();
                fileNew.delete();
                throw new IOException
                    (sm.getString("memoryUserDatabase.writeException",
                                  fileNew.getAbsolutePath()));

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      Iterator ce = connections.iterator();
      for(Iterator e = writers.iterator();e.hasNext();) {
        ce.next();
        PrintWriter writer = (PrintWriter)e.next();
        writer.print(message);
        if(writer.checkError()) {
          ce.remove();
          e.remove();
        }
      }
    }

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            }
        }
        else if (out instanceof PrintWriter)
        {
            PrintWriter pout=(PrintWriter)out;
            while (!pout.checkError())
            {
                len=in.read(buffer,0,bufferSize);
                if (len==-1)
                    break;
                out.write(buffer,0,len);

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                PrintWriter out=response.getWriter();
                char[] c=chunk.toCharArray();
                for (int i=0;i<writes;i++)
                {
                    out.write(c);
                    if (out.checkError())
                        break;
                }
            }
            else
            {

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                response.setCharacterEncoding(encoding);
                PrintWriter out=response.getWriter();
                for (int i=0;i<writes;i++)
                {
                    out.write(chunk);
                    if (out.checkError())
                        break;
                }
            }


        }

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                response.setHeader(HttpHeader.CONTENT_TYPE.toString(),MimeTypes.Type.TEXT_HTML.toString());
                response.setHeader("LongStr", longstr);
                PrintWriter writer = response.getWriter();
                writer.write("<html><h1>FOO</h1></html>");
                writer.flush();
                if (writer.checkError())
                    checkError.countDown();
                response.flushBuffer();
            }
        });
        server.start();

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    {
        Response response = newResponse();
        PrintWriter writer = response.getWriter();
        response.setContentLength(0);
        assertTrue(!response.isCommitted());
        assertTrue(!writer.checkError());
        writer.print("");
        assertTrue(!writer.checkError());
        assertTrue(response.isCommitted());
    }

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