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ExportDataDumper.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2009 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
 * Development and Distribution License("CDDL") (collectively, the
 * "License"). You may not use this file except in compliance with the
 * License. You can obtain a copy of the License at
 * http://www.netbeans.org/cddl-gplv2.html
 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
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 * particular file as subject to the "Classpath" exception as provided
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package org.netbeans.lib.profiler.results;

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;


/**
 * An instance of this class is passed to code that generates text representation of profiling
 * results for export. It is intended that the text generating code periodically checks the size
 * of the StringBuffer it uses for storage, and if it's above some critical value, dumps it using
 * the code below. If there is an error during this process, it is not returned immediately to avoid
 * making text generator code too complex - instead the caller can eventually retrieve the error
 * using the getCaughtException() method.
 *
 * @author Misha Dmitriev
 * @author cyhelsky
 */
00059 public class ExportDataDumper {
    //~ Static fields/initializers -----------------------------------------------------------------------------------------------

    public static final int BUFFER_SIZE = 32000; //roughly 32 kB buffer

    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    BufferedOutputStream bos;
    IOException caughtEx;
    int numExceptions=0;

    //~ Constructors -------------------------------------------------------------------------------------------------------------

    public ExportDataDumper(FileOutputStream fw) {
        bos = new BufferedOutputStream(fw, BUFFER_SIZE);
    }

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public IOException getCaughtException() {
        return caughtEx;
    }

    public int getNumExceptions() {
        return numExceptions;
    }

    public void dumpData(StringBuffer s) {
        if (caughtEx != null) {
            return;
        }

        try {
            if (s!=null) bos.write(s.toString().getBytes());
        } catch (IOException ex) {
            caughtEx = ex;
            System.out.println(s);
            numExceptions++;
            System.err.println(ex.getMessage());
        }
    }

    public void close() {
        try {
            bos.close();
        } catch (IOException ex) {
            caughtEx = ex;
            System.err.println(ex.getMessage());
        }
    }

    public void dumpDataAndClose(StringBuffer s) {
        dumpData(s);
        close();
    }

    public BufferedOutputStream getOutputStream() {
        return bos;
    }
}

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