com.lucidtechnics.blackboard.util.error.ErrorManager.java Source code

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Here is the source code for com.lucidtechnics.blackboard.util.error.ErrorManager.java

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/*
* Copyright 2002-2006 Bediako George.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package com.lucidtechnics.blackboard.util.error;

import com.lucidtechnics.blackboard.BlackboardException;
import org.apache.commons.logging.Log;

import java.io.PrintWriter;
import java.io.StringWriter;

public final class ErrorManager {
    private static ErrorManager errorManager;

    private ErrorManager() {
    }

    public synchronized static ErrorManager getInstance() {
        if (errorManager == null) {
            errorManager = new ErrorManager();
        }

        return errorManager;
    }

    public void logException(Throwable _throwable, Log _logger) {
        PrintWriter printWriter = null;
        StringWriter stringWriter = null;

        try {
            _logger.error("Encountered exception with message: " + _throwable.getMessage());
            _logger.error("WITH JAVA STACK TRACE:\n");

            stringWriter = new StringWriter();
            printWriter = new PrintWriter(stringWriter);

            _throwable.printStackTrace(printWriter);

            _logger.error(stringWriter.toString());
        } catch (Exception e) {

        } finally {
            if (stringWriter != null) {
                try {
                    stringWriter.close();
                } catch (Exception e) {
                }
            }
            if (printWriter != null) {
                try {
                    printWriter.close();
                } catch (Exception e) {
                }
            }
        }
    }

    public void throwException(Throwable _t, Log _logger) {
        logException(_t, _logger);

        if (_logger.isDebugEnabled() == true) {
            _logger.debug("ErrorManager Found this exception: " + _t.getClass());
        }

        if ((_t instanceof BlackboardException) == true) {
            throw (BlackboardException) _t;
        } else {
            throw new BlackboardException(_t);
        }
    }

    public void throwExceptionNoLogging(Throwable _t) {
        if ((_t instanceof BlackboardException) == true) {
            throw (BlackboardException) _t;
        } else {
            throw new BlackboardException(_t);
        }
    }

    public void throwUnwrappedRuntimeException(RuntimeException _r, Log _logger) {
        logException(_r, _logger);
        throw _r;
    }

    public void warnException(Throwable _throwable, Log _logger) {
        PrintWriter printWriter = null;
        StringWriter stringWriter = null;

        try {
            _logger.warn("Encountered exception with message: " + _throwable.getMessage());
            _logger.warn("WITH JAVA STACK TRACE:\n");

            stringWriter = new StringWriter();
            printWriter = new PrintWriter(stringWriter);

            _throwable.printStackTrace(printWriter);

            _logger.error(stringWriter.toString());
        } catch (Exception e) {

        } finally {
            if (stringWriter != null) {
                try {
                    stringWriter.close();
                } catch (Exception e) {
                }
            }
            if (printWriter != null) {
                try {
                    printWriter.close();
                } catch (Exception e) {
                }
            }
        }
    }

    public void warn(String _message, Log _logger) {
        _logger.warn(_message);
    }
}