/*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you 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 org.apache.synapse.transport.vfs;

import org.apache.axis2.AxisFault;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.description.Parameter;
import org.apache.axis2.description.ParameterInclude;
import org.apache.axis2.transport.base.AbstractPollTableEntry;
import org.apache.axis2.transport.base.ParamUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.synapse.commons.crypto.CryptoUtil;
import org.apache.synapse.commons.vfs.VFSConstants;
import org.apache.synapse.commons.vfs.VFSUtils;
import org.apache.synapse.transport.vfs.VFSTransportErrorHandler.LogType;

import java.net.UnknownHostException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Holds information about an entry in the VFS transport poll table used by the
 * VFS Transport Listener
 */
public class PollTableEntry extends AbstractPollTableEntry {

    // operation after scan
    public static final int DELETE = 0;
    public static final int MOVE   = 1;
    public static final int NONE   = 2;

    /** File or Directory to scan */
    private String fileURI;
    /** The URI to send replies to. May be null. */
    private String replyFileURI;
    /** file name pattern for a directory or compressed file entry */
    private String fileNamePattern;
    /** Content-Type to use for the message */
    private String contentType;

    /** Should the last updated time timestamp be updated */
    private boolean updateLastModified;

    /** action to take after a successful poll */
    private int actionAfterProcess = DELETE;
    /** action to take after a poll with errors */
    private int actionAfterErrors = DELETE;
    /** action to take after a failed poll */
    private int actionAfterFailure = DELETE;

    /** where to move the file after processing */
    private String moveAfterProcess;
    /** where to move the file after encountering some errors */
    private String moveAfterErrors;
    /** where to move the file after total failure */
    private String moveAfterFailure;
    /** moved file will have this formatted timestamp prefix */    
    private DateFormat moveTimestampFormat;

    private boolean streaming;

    private int maxRetryCount;
    private long reconnectTimeout;
    private boolean fileLocking;

    private CryptoUtil cryptoUtil;
    private Properties secureVaultProperties;

    /**
     * Only files smaller than this limit will get processed, it can be configured with param
     * "transport.vfs.FileSizeLimit", and this will have default value -1 which means unlimited file size
     * This should be specified in bytes
     */
    private double fileSizeLimit = VFSConstants.DEFAULT_TRANSPORT_FILE_SIZE_LIMIT;

    private String moveAfterMoveFailure;

    private int nextRetryDurationForFailedMove;

    private String failedRecordFileName;

    private String failedRecordFileDestination;

    private String failedRecordTimestampFormat;

    private Integer fileProcessingInterval;
    
    private Integer fileProcessingCount;

    private Map<String, String> vfsSchemeProperties;
    private boolean autoLockRelease;

    private Long autoLockReleaseInterval;

    private Boolean autoLockReleaseSameNode;   
    
    private boolean distributedLock;
    
    private String fileSortParam;
    
    private boolean fileSortAscending;
    
    private boolean forceCreateFolder;
    
    private String subfolderTimestamp;
    
    private Long distributedLockTimeout;

    private volatile boolean canceled;

    private boolean clusterAware;

    /**
     * This parameter is used decide whether the resolving hostname IP of URIs are done at deployment or dynamically.
     * At usage default id 'false' which lead hostname resolution at deployment
     */
    private boolean resolveHostsDynamically = false;
    private boolean fileNotFoundLogged = false;

    private ParameterInclude params;

    private static final Log log = LogFactory.getLog(PollTableEntry.class);
    
    public PollTableEntry(boolean fileLocking) {
        this.fileLocking = fileLocking;
    }

    @Override
    public EndpointReference[] getEndpointReferences(AxisService service, String ip) {
        return new EndpointReference[] { new EndpointReference("vfs:" + fileURI) };
    }

    public String getFileURI() {
        if (resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(fileURI);
            } catch (UnknownHostException | FileSystemException e) {
                String message = "Unable to resolve the hostname of transport.vfs.FileURI : " +
                        VFSUtils.maskURLPassword(fileURI);
                VFSTransportErrorHandler.logException(log, LogType.WARN, message, getServiceName(), e);
            }
        }
        return  fileURI;
    }

    public String getReplyFileURI() {
        if (resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(replyFileURI);
            } catch (UnknownHostException | FileSystemException e) {
                String message = "Unable to resolve the hostname of transport.vfs.ReplyFileURI : " +
                        VFSUtils.maskURLPassword(replyFileURI);
                VFSTransportErrorHandler.logException(log, LogType.WARN, message, getServiceName(), e);
            }
        }
        return replyFileURI;
    }

    public String getFileNamePattern() {
        return fileNamePattern;
    }

    public String getContentType() {
        return contentType;
    }

    public boolean getUpdateLastModified() {
        return updateLastModified;
    }

    public int getActionAfterProcess() {
        return actionAfterProcess;
    }

    public int getActionAfterErrors() {
        return actionAfterErrors;
    }

    public int getActionAfterFailure() {
        return actionAfterFailure;
    }

    public String getMoveAfterProcess() {
        if (resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(moveAfterProcess);
            }  catch (UnknownHostException | FileSystemException e) {
                String message = "Unable to resolve the hostname of transport.vfs.MoveAfterProcess: " +
                        VFSUtils.maskURLPassword(moveAfterProcess);
                VFSTransportErrorHandler.logException(log, LogType.WARN, message, getServiceName(), e);
            }
        }
        return moveAfterProcess;
    }

    public String getMoveAfterMoveFailure() {
        if (resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(moveAfterMoveFailure);
            }  catch (UnknownHostException | FileSystemException e) {
                String message = "Unable to resolve the hostname of transport.vfs.MoveAfterFailedMove: " +
                        VFSUtils.maskURLPassword(moveAfterMoveFailure);
                VFSTransportErrorHandler.logException(log, LogType.WARN, message, getServiceName(), e);
            }
        }
        return moveAfterMoveFailure;
    }

    public int getNextRetryDuration() {
        return nextRetryDurationForFailedMove;
    }

    public String getFailedRecordFileName() {
        return failedRecordFileName;
    }

    public String getFailedRecordFileDestination() {
        return failedRecordFileDestination;
    }

    public String getFailedRecordTimestampFormat() {
        return failedRecordTimestampFormat;
    }

    public Integer getFileProcessingInterval() {
		return fileProcessingInterval;
	}

	public Integer getFileProcessingCount() {
		return fileProcessingCount;
	}

	private void setMoveAfterProcess(String moveAfterProcess) throws AxisFault {
        if (moveAfterProcess == null) {
            this.moveAfterProcess = null;
        } else if (moveAfterProcess.startsWith(VFSConstants.VFS_PREFIX)) {
            // to recover a good directory location if user entered with the vfs: prefix
            // because transport uris are given like that
            this.moveAfterProcess = resolveHostAtDeployment(moveAfterProcess.substring(VFSConstants.VFS_PREFIX.length()));
        } else {
            this.moveAfterProcess = resolveHostAtDeployment(moveAfterProcess);
        }
    }

    public String getMoveAfterErrors() {
        if (resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(moveAfterErrors);
            } catch (UnknownHostException | FileSystemException e) {
                String message = "Unable to resolve the hostname of transport.vfs.MoveAfterErrors: " +
                        VFSUtils.maskURLPassword(moveAfterErrors);
                VFSTransportErrorHandler.logException(log, LogType.WARN, message, e);
            }
        }
        return moveAfterErrors;
    }

    private void setMoveAfterErrors(String moveAfterErrors) throws AxisFault {
        if (moveAfterErrors == null) {
            this.moveAfterErrors = null;
        } else if (moveAfterErrors.startsWith(VFSConstants.VFS_PREFIX)) {
            this.moveAfterErrors = resolveHostAtDeployment(moveAfterErrors.substring(VFSConstants.VFS_PREFIX.length()));
        } else {
            this.moveAfterErrors = resolveHostAtDeployment(moveAfterErrors);
        }  
    }

    public String getMoveAfterFailure() {
        if (resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(moveAfterFailure);
            } catch (UnknownHostException | FileSystemException e) {
                String message = "Unable to resolve the hostname of transport.vfs.MoveAfterFailure: " +
                        VFSUtils.maskURLPassword(moveAfterFailure);
                VFSTransportErrorHandler.logException(log, LogType.WARN, message, getServiceName(), e);
            }
        }
        return moveAfterFailure;
    }

    private void setMoveAfterFailure(String moveAfterFailure) throws AxisFault {
        if (moveAfterFailure == null) {
            this.moveAfterFailure = null;
        } else if (moveAfterFailure.startsWith(VFSConstants.VFS_PREFIX)) {
            this.moveAfterFailure = resolveHostAtDeployment(moveAfterFailure.substring(VFSConstants.VFS_PREFIX.length()));
        } else {
            this.moveAfterFailure = resolveHostAtDeployment(moveAfterFailure);
        }
    }

    public boolean isStreaming() {
        return streaming;
    }

    public int getMaxRetryCount() {
        return maxRetryCount;
    }

    public boolean isFileLockingEnabled() {
        return fileLocking;
    }

    public void setSecureVaultProperties(Properties secureVaultProperties) {
        this.secureVaultProperties = secureVaultProperties;
    }

    public double getFileSizeLimit() {
        return fileSizeLimit;
    }

    public long getReconnectTimeout() {
        return reconnectTimeout;
    }

    public DateFormat getMoveTimestampFormat() {
        return moveTimestampFormat;
    }

    /**
     * @return the autoLockRelease
     */
    public Boolean getAutoLockRelease() {
        return autoLockRelease;
    }

    /**
     * @param autoLockRelease the autoLockRelease to set
     */
    public void setAutoLockRelease(Boolean autoLockRelease) {
        this.autoLockRelease = autoLockRelease;
    }

    /**
     * @return the autoLockReleaseInterval
     */
    public Long getAutoLockReleaseInterval() {
        return autoLockReleaseInterval;
    }

    /**
     * @param autoLockReleaseInterval the autoLockReleaseInterval to set
     */
    public void setAutoLockReleaseInterval(Long autoLockReleaseInterval) {
        this.autoLockReleaseInterval = autoLockReleaseInterval;
    }

    /**
     * @return the autoLockReleaseSameNode
     */
    public Boolean getAutoLockReleaseSameNode() {
        return autoLockReleaseSameNode;
    }

    /**
     * @param autoLockReleaseSameNode the autoLockReleaseSameNode to set
     */
    public void setAutoLockReleaseSameNode(Boolean autoLockReleaseSameNode) {
        this.autoLockReleaseSameNode = autoLockReleaseSameNode;
    }

    
    
    /**
     * @return the distributedLock
     */
    public boolean isDistributedLock() {
        return distributedLock;
    }

    
    
    /**
     * @return the fileSortParam
     */
    public String getFileSortParam() {
        return fileSortParam;
    }

    /**
     * @param fileSortParam the fileSortParam to set
     */
    public void setFileSortParam(String fileSortParam) {
        this.fileSortParam = fileSortParam;
    }

    /**
     * @return the fileSortAscending
     */
    public boolean isFileSortAscending() {
        return fileSortAscending;
    }

    /**
     * @param fileSortAscending the fileSortAscending to set
     */
    public void setFileSortAscending(boolean fileSortAscending) {
        this.fileSortAscending = fileSortAscending;
    }

    /**
     * @return the distributedLockTimeout
     */
    public Long getDistributedLockTimeout() {
        return distributedLockTimeout;
    }

    public boolean isCanceled() {
        return canceled;
    }

    public void setCanceled(boolean canceled) {
        this.canceled = canceled;
    }

    public boolean isClusterAware() {
        return clusterAware;
    }

    public void setClusterAware(boolean clusterAware) {
        this.clusterAware = clusterAware;
    }

    public boolean isResolveHostsDynamically() {
        return resolveHostsDynamically;
    }

    public Map<String, String> getVfsSchemeProperties() {
        return vfsSchemeProperties;
    }

    public void setVfsSchemeProperties(Map<String, String> vfsSchemeProperties) {
        this.vfsSchemeProperties = vfsSchemeProperties;
    }

    /**
     * Checks if the file not found warning has been logged.
     *
     * @return {@code true} if the file not found warning has been logged,
     *         {@code false} otherwise.
     */
    public boolean isFileNotFoundLogged() {
        return fileNotFoundLogged;
    }

    /**
     * Sets the file not found logged flag.
     *
     * @param fileNotFoundLogged {@code true} to indicate that the file not found warning has been logged,
     *                           {@code false} otherwise.
     */
    public void setFileNotFoundLogged(boolean fileNotFoundLogged) {
        this.fileNotFoundLogged = fileNotFoundLogged;
    }

    public ParameterInclude getParams() {
        return params;
    }
    
    /**
     * @return the forceCreateFolder
     */
    public boolean isForceCreateFolder() {
        return forceCreateFolder;
    }

    /**
     * @param forceCreateFolder the forceCreateFolder to set
     */
    public void setForceCreateFolder(boolean forceCreateFolder) {
        this.forceCreateFolder = forceCreateFolder;
    }

    /**
     * @return the subfolderTimestamp
     */
    public String getSubfolderTimestamp() {
        return subfolderTimestamp;
    }

    /**
     * @param subfolderTimestamp the subfolderTimestamp to set
     */
    public void setSubfolderTimestamp(String subfolderTimestamp) {
        this.subfolderTimestamp = subfolderTimestamp;
    }

    @Override
    public boolean loadConfiguration(ParameterInclude params) throws AxisFault {
        decryptParamsIfRequired(params);
        this.params = params;
        resolveHostsDynamically = ParamUtils.getOptionalParamBoolean(params,
                VFSConstants.TRANSPORT_FILE_RESOLVEHOST_DYNAMICALLY, false);

        if (params instanceof AxisService) {
            return loadConfigurationsFromService(params);
        } else {
            return false;
        }
    }

    protected boolean loadConfigurationsFromService(ParameterInclude params) throws AxisFault {
        fileURI = ParamUtils.getOptionalParam(params, VFSConstants.TRANSPORT_FILE_FILE_URI);
        if (fileURI == null) {
            VFSTransportErrorHandler.logException(log, LogType.WARN,
                    "transport.vfs.FileURI parameter is missing in the proxy service configuration");
            return false;
        } else {

            if (fileURI.startsWith(VFSConstants.VFS_PREFIX)) {
                fileURI = fileURI.substring(VFSConstants.VFS_PREFIX.length());
            }
            fileURI = resolveHostAtDeployment(fileURI);

            replyFileURI = ParamUtils.getOptionalParam(params, VFSConstants.REPLY_FILE_URI);
            replyFileURI = resolveHostAtDeployment(replyFileURI);

            fileNamePattern = ParamUtils.getOptionalParam(params,
                                                          VFSConstants.TRANSPORT_FILE_FILE_NAME_PATTERN);

            contentType = ParamUtils.getRequiredParam(params,
                                                      VFSConstants.TRANSPORT_FILE_CONTENT_TYPE);

            updateLastModified = ParamUtils.getOptionalParamBoolean(params,
                                                      VFSConstants.UPDATE_LAST_MODIFIED, true);
            String option = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_ACTION_AFTER_PROCESS);
            if (option == null) {
                option = VFSTransportListener.DELETE;
            }
            switch (option) {
                case VFSTransportListener.MOVE:
                    actionAfterProcess = PollTableEntry.MOVE;
                    break;
                case VFSTransportListener.DELETE:
                    actionAfterProcess = PollTableEntry.DELETE;
                    break;
                case VFSTransportListener.NONE:
                    actionAfterProcess = PollTableEntry.NONE;
                    break;
                default:
                    actionAfterProcess = PollTableEntry.DELETE;
            }

            option = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_ACTION_AFTER_ERRORS);
            actionAfterErrors = VFSTransportListener.MOVE.equals(option) ?
                    PollTableEntry.MOVE : PollTableEntry.DELETE;

            option = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_ACTION_AFTER_FAILURE);
            if (option == null) {
                option = VFSTransportListener.DELETE;
            }
            switch (option) {
                case VFSTransportListener.MOVE:
                    actionAfterFailure = PollTableEntry.MOVE;
                    break;
                case VFSTransportListener.DELETE:
                    actionAfterFailure = PollTableEntry.DELETE;
                    break;
                case VFSTransportListener.NONE:
                    actionAfterFailure = PollTableEntry.NONE;
                    break;
                default:
                    actionAfterFailure = PollTableEntry.DELETE;
            }

            String moveDirectoryAfterProcess = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_MOVE_AFTER_PROCESS);
            setMoveAfterProcess(moveDirectoryAfterProcess);

            String moveDirectoryAfterErrors = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_MOVE_AFTER_ERRORS);
            setMoveAfterErrors(moveDirectoryAfterErrors);

            String moveDirectoryAfterFailure = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_MOVE_AFTER_FAILURE);
            setMoveAfterFailure(moveDirectoryAfterFailure);

            String moveFileTimestampFormat = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_MOVE_TIMESTAMP_FORMAT);
            if (moveFileTimestampFormat != null) {
                moveTimestampFormat = new SimpleDateFormat(moveFileTimestampFormat);
            }

            Map<String, String> schemeFileOptions = VFSUtils.parseSchemeFileOptions(fileURI, params);
            setVfsSchemeProperties(schemeFileOptions);

            String strStreaming = ParamUtils.getOptionalParam(params, VFSConstants.STREAMING);
            if (strStreaming != null) {
                streaming = Boolean.parseBoolean(strStreaming);
            }

            String strMaxRetryCount = ParamUtils.getOptionalParam(
                    params, VFSConstants.MAX_RETRY_COUNT);
            maxRetryCount = strMaxRetryCount != null ? Integer.parseInt(strMaxRetryCount) :
                    VFSConstants.DEFAULT_MAX_RETRY_COUNT;

            String strReconnectTimeout = ParamUtils.getOptionalParam(
                    params, VFSConstants.RECONNECT_TIMEOUT);
            reconnectTimeout = strReconnectTimeout != null ?
                    Integer.parseInt(strReconnectTimeout) * 1000 :
                    VFSConstants.DEFAULT_RECONNECT_TIMEOUT;

            String strFileLocking = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_LOCKING);
            if (VFSConstants.TRANSPORT_FILE_LOCKING_ENABLED.equals(strFileLocking)) {
                fileLocking = true;
            } else if (VFSConstants.TRANSPORT_FILE_LOCKING_DISABLED.equals(strFileLocking)) {
                fileLocking = false;
            }

            String strFileSizeLimit = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FILE_SIZE_LIMIT);

            try {
                fileSizeLimit = strFileSizeLimit != null ? Double.parseDouble(strFileSizeLimit) :
                        VFSConstants.DEFAULT_TRANSPORT_FILE_SIZE_LIMIT;
            } catch (Exception e) {
                String message = "Error parsing specified file size limit - " + strFileSizeLimit +
                        ", using default - unlimited";
                VFSTransportErrorHandler.logException(log, LogType.WARN, message);
            }

            moveAfterMoveFailure = ParamUtils.getOptionalParam(params,
                                                               VFSConstants.TRANSPORT_FILE_MOVE_AFTER_FAILED_MOVE);
            moveAfterMoveFailure = resolveHostAtDeployment(moveAfterMoveFailure);

            String nextRetryDuration = ParamUtils.getOptionalParam(
                    params, VFSConstants.TRANSPORT_FAILED_RECORD_NEXT_RETRY_DURATION);
            nextRetryDurationForFailedMove = nextRetryDuration != null ? Integer.parseInt(nextRetryDuration) :
                    VFSConstants.DEFAULT_NEXT_RETRY_DURATION;

            failedRecordFileName = ParamUtils.getOptionalParam(params,
                                                               VFSConstants.TRANSPORT_FAILED_RECORDS_FILE_NAME);
            if (failedRecordFileName == null) {
                failedRecordFileName = VFSConstants.DEFAULT_FAILED_RECORDS_FILE_NAME;
            }

            failedRecordFileDestination = ParamUtils.getOptionalParam(params,
                                                                      VFSConstants
                                                                              .TRANSPORT_FAILED_RECORDS_FILE_DESTINATION);

            if (failedRecordFileDestination == null) {
                failedRecordFileDestination = VFSConstants.DEFAULT_FAILED_RECORDS_FILE_DESTINATION;
            }

            failedRecordTimestampFormat = ParamUtils.getOptionalParam(params,
                                                                      VFSConstants
                                                                              .TRANSPORT_FAILED_RECORD_TIMESTAMP_FORMAT);
            if (failedRecordTimestampFormat == null) {
                failedRecordTimestampFormat =
                        VFSConstants.DEFAULT_TRANSPORT_FAILED_RECORD_TIMESTAMP_FORMAT;
            }

            String strFileProcessingInterval = ParamUtils.getOptionalParam(params,
                                                                           VFSConstants.TRANSPORT_FILE_INTERVAL);
            fileProcessingInterval = null;
            if (strFileProcessingInterval != null) {
                try {
                    fileProcessingInterval = Integer.parseInt(strFileProcessingInterval);
                } catch (NumberFormatException nfe) {
                    String message = "VFS File Processing Interval not set correctly. Current value is : "
                            + strFileProcessingInterval;
                    VFSTransportErrorHandler.logException(log, LogType.WARN, message, nfe);
                }
            }

            String strFileProcessingCount = ParamUtils.getOptionalParam(params, VFSConstants.TRANSPORT_FILE_COUNT);
            fileProcessingCount = null;
            if (strFileProcessingCount != null) {
                try {
                    fileProcessingCount = Integer.parseInt(strFileProcessingCount);
                } catch (NumberFormatException nfe) {
                    String message = "VFS File Processing Count not set correctly. Current value is : "
                             + strFileProcessingCount;
                    VFSTransportErrorHandler.logException(log, LogType.WARN, message, nfe);
                }
            }

            String strAutoLock = ParamUtils.getOptionalParam(params,
                                                             VFSConstants.TRANSPORT_AUTO_LOCK_RELEASE);
            autoLockRelease = false;
            autoLockReleaseSameNode = true;
            autoLockReleaseInterval = null;
            if (strAutoLock != null) {
                try {
                    autoLockRelease = Boolean.parseBoolean(strAutoLock);
                } catch (Exception e) {
                    autoLockRelease = false;
                    String message = "VFS Auto lock removal not set properly. Current value is : " + strAutoLock;
                    VFSTransportErrorHandler.logException(log, LogType.WARN, message, e);
                }
                if (autoLockRelease) {
                    String strAutoLockInterval = ParamUtils.getOptionalParam(params,
                                                                             VFSConstants
                                                                                     .TRANSPORT_AUTO_LOCK_RELEASE_INTERVAL);
                    if (strAutoLockInterval != null) {
                        try {
                            autoLockReleaseInterval = Long.parseLong(strAutoLockInterval);
                        } catch (Exception e) {
                            autoLockReleaseInterval = null;
                            String message = "VFS Auto lock removal property not set properly. Current value is : "
                                            + strAutoLockInterval;
                            VFSTransportErrorHandler.logException(log, LogType.WARN, message, e);
                        }
                    }
                    String strAutoLockReleaseSameNode = ParamUtils.getOptionalParam(params,
                                                                                    VFSConstants
                                                                                            .TRANSPORT_AUTO_LOCK_RELEASE_SAME_NODE);
                    if (strAutoLockReleaseSameNode != null) {
                        try {
                            autoLockReleaseSameNode = Boolean
                                    .parseBoolean(strAutoLockReleaseSameNode);
                        } catch (Exception e) {
                            autoLockReleaseSameNode = true;
                            String message = "VFS Auto lock removal property not set properly. Current value is : "
                                    + autoLockReleaseSameNode;
                            VFSTransportErrorHandler.logException(log, LogType.WARN, message, e);
                        }
                    }
                }

            }

            distributedLock = false;
            distributedLockTimeout = null;
            String strDistributedLock = ParamUtils.getOptionalParam(params,
                                                                    VFSConstants.TRANSPORT_DISTRIBUTED_LOCK);
            if (strDistributedLock != null) {
                try {
                    distributedLock = Boolean.parseBoolean(strDistributedLock);
                } catch (Exception e) {
                    autoLockRelease = false;
                    String message = "VFS Distributed lock not set properly. Current value is : " + strDistributedLock;
                    VFSTransportErrorHandler.logException(log, LogType.WARN, message, e);
                }

                if (distributedLock) {
                    String strDistributedLockTimeout = ParamUtils.getOptionalParam(params,
                                                                                   VFSConstants
                                                                                           .TRANSPORT_DISTRIBUTED_LOCK_TIMEOUT);
                    if (strDistributedLockTimeout != null) {
                        try {
                            distributedLockTimeout = Long.parseLong(strDistributedLockTimeout);
                        } catch (Exception e) {
                            distributedLockTimeout = null;
                            String message = "VFS Distributed lock timeout property not set properly. Current value is : "
                                    + strDistributedLockTimeout;
                            VFSTransportErrorHandler.logException(log, LogType.WARN, message, e);
                        }
                    }
                }

            }

            fileSortParam = ParamUtils.getOptionalParam(params, VFSConstants.FILE_SORT_PARAM);
            fileSortAscending = true;
            if (fileSortParam != null
                && ParamUtils.getOptionalParam(params, VFSConstants.FILE_SORT_ORDER) != null) {
                try {
                    fileSortAscending = Boolean.parseBoolean(ParamUtils.getOptionalParam(params,
                                                                                         VFSConstants
                                                                                                 .FILE_SORT_ORDER));
                } catch (Exception e) {
                    fileSortAscending = true;
                }

            }

            String strForceCreateFolder = ParamUtils.getOptionalParam(params, VFSConstants.FORCE_CREATE_FOLDER);
            forceCreateFolder = false;
            if (strForceCreateFolder != null && "true".equals(strForceCreateFolder.toLowerCase())) {
                forceCreateFolder = true;
            }

            subfolderTimestamp = ParamUtils.getOptionalParam(params, VFSConstants.SUBFOLDER_TIMESTAMP);
            this.clusterAware = ParamUtils.getOptionalParamBoolean(params, VFSConstants.CLUSTER_AWARE, false);
            return super.loadConfiguration(params);
        }
    }

    private String resolveHostAtDeployment(String uri) throws AxisFault {
        if (!resolveHostsDynamically) {
            try {
                return VFSUtils.resolveUriHost(uri, new StringBuilder());
            } catch (FileSystemException e) {
                String errorMsg = "Unable to decode the malformed URI : " + VFSUtils.maskURLPassword(uri);
                //log the error since if we only throw AxisFault, we won't get the entire stacktrace in logs to
                // identify root cause to users
                VFSTransportErrorHandler.handleException(log, errorMsg, e);

            } catch (UnknownHostException e) {
                String errorMsg = "Error occurred while resolving hostname of URI : " + VFSUtils.maskURLPassword(uri);
                //log the error since if we only throw AxisFault, we won't get the entire stacktrace in logs to
                // identify root cause to users
                VFSTransportErrorHandler.handleException(log, errorMsg, e);
            }
        }
        return uri;
    }

    /**
     * Iterate ParameterInclude and decrypt parameters if required.
     *
     * @param params ParameterInclude instance
     * @throws AxisFault
     */
    private void decryptParamsIfRequired(ParameterInclude params) throws AxisFault {
        for (Parameter param : params.getParameters()) {
            if (param != null && param.getValue() != null && param.getValue() instanceof String) {
                param.setValue(decryptIfRequired(param.getValue().toString()));
            }
        }
    }

    /**
     * Helper method to decrypt parameters if required.
     * If the parameter is defined as - {wso2:vault-decrypt('Parameter')}, then this method will treat it as deryption
     * required and do the relevant decryption for that part.
     *
     * @param parameter
     * @return parameter
     * @throws AxisFault
     */
    private String decryptIfRequired(String parameter) throws AxisFault {
        if (parameter != null && !parameter.isEmpty()) {
            // Create a Pattern object
            Pattern r = Pattern.compile("\\{wso2:vault-decrypt\\('(.*?)'\\)\\}");

            // Now create matcher object.
            Matcher m = r.matcher(parameter);
            if (m.find()) {
                if (cryptoUtil == null) {
                    cryptoUtil = new CryptoUtil(secureVaultProperties);
                }
                if (!cryptoUtil.isInitialized()) {
                    VFSTransportErrorHandler.handleException(log, "Error initialising cryptoutil");
                }
                String toDecrypt = m.group(1);
                toDecrypt = new String(cryptoUtil.decrypt(toDecrypt.getBytes()));
                parameter = m.replaceFirst(toDecrypt);
            }
        }
        return parameter;
    }
}
