Which of the following file modes does retains file data and append new data
If a failure occurs during the final transfer of the file to the output directory, you can choose whether the file is deleted, moved to the failure directory (mqsifailure), renamed before being moved to the failure directory, or no action is taken. The chosen action is not effective if the file is being written directly to the output file on your local system and the FTP property is cleared. Show
You can specify that the FileOutput node transfers files to a remote FTP or SFTP server as part of file processing. If the file is successfully transferred, it can be deleted from the local file system, or, optionally, retained for the rest of the file processing to occur as usual. The server is identified by the Remote server and port property on the node. Alternatively, you can override the node property by setting a value in the local environment. You can also use the local environment to specify commands to run before or after an FTP or SFTP transfer finishes. For more information, see Local environment overrides for the remote server on the FileOutput node. During the file transfer operation, the FileOutput creates the destination file. However, the destination file is readable before the file transfer is complete. Therefore, ensure that remote applications do not read the file until the file transfer is complete. When multiple records are written, no file processing occurs until a message is received on the Finish File terminal of the node. Any message received on the Finish File terminal causes the file to be moved from the transit directory to either the specified output directory or to a remote FTP or SFTP directory. It is not an error if file processing is initiated when there is no file in the transit directory. If you set the Record definition property to Record is Whole File on the Records and Elements tab, messages received on the Finish File processing are ignored because the file has already been processed. On Linux®, UNIX, and z/OS® systems, the permissions that new files are created with are determined by the umask value. The minimum permission required by IBM® Integration Bus for all files, including internal configuration files, is for user and group to have read/write access (660). Consequently, the umask value is set to 0006 by default. You can override the default umask value by using the following environment variables, although IBM Integration Bus will try to ensure that user and group maintain read/write access:MQSI_SET_DFE_UMASK=nnnnUsing this environment variable, you can override the umask for new files that are created by integration server processes. nnnn is the octal representation of the desired file creation mask.MQSI_UMASK_COPY=nIf this environment variable is set to any value and MQSI_SET_DFE_UMASK is not set, the umask value is copied from the umask setting of the shell environment, which is often the system default value. Note: Care is required when overriding the umask value to ensure that directories and files created by IBM Integration Bus have a minimum permission of 660 and 770 respectively. A good understanding of umask is needed before using the overrides. If the permissions of newly created directories and files is overly restricted, IBM Integration Bus might not be able to restart successfully. Message propagationFor every message received on the In terminal and successfully processed by the node, a copy is propagated to the Out terminal for further processing if the terminal is attached. For every message received on the Finish File terminal and successfully processed by the node, a copy is propagated to the End of Data terminal for further processing if the terminal is attached. When the FileOutput node propagates a message, either to the Out terminal or to the End of Data terminal, it stores information in the LocalEnvironment.WrittenDestination.File message tree. This table describes the LocalEnvironment.WrittenDestination.File elements: Element NameElement Data TypeDescriptionDirectoryCHARACTERAbsolute path of the output directory in the form used by the file system of the integration node. For example, on Windows systems, the directory path starts with the drive letter prefix (such as C:).NameCHARACTERName of the output file.ActionCHARACTERPossible values are:
Multiple instancesSeveral message flows might write to the same file, which can happen where there are additional instances of the flow, or where multiple flows contain FileOutput nodes. The FileOutput node permits only a single instance, within an integration server and between integration servers, to write to a file at the same time. While a record is being written, all other instances in the integration server must wait. The order in which instances gain access is not defined. When the file is complete, the first instance to gain access processes it, and other instances do not find the file. The Action element of the LocalEnvironment.WrittenDestination.File message tree is set to The FileOutput node terminals are described in the following table. TerminalDescriptionInThe input terminal that accepts a message for processing by the node.Finish FileThe input terminal that accepts a message that triggers the final processing of a file.OutThe message received on the In terminal is propagated to this terminal if the record is written successfully. The message is unchanged except for status information in the Local Environment.End of DataThe message received on the Finish File terminal is propagated to this terminal if the file is processed successfully.FailureThe output terminal to which the message is routed if a failure is detected when a message is propagated. The following tables describe the node properties that you can set on a specified tab. The column headed M indicates whether the property is mandatory (marked with an asterisk if you must enter a value when no default is defined); the column headed C indicates whether the property is configurable (you can change the value when you add the message flow to the BAR file to deploy it). The FileOutput node Description properties are described in the following table. PropertyMCDefaultDescriptionNode nameNoNoFileOutputThe name of the node.Short DescriptionNoNo A brief description of the node.Long DescriptionNoNo Text that describes the purpose of the node in the message flow. The FileOutput node Basic properties are described in the following table. PropertyMCDefaultDescriptionmqsiapplybaroverride command propertyAction on final file processing failureNoNoNo ActionThe action that the node takes with the output file if the final processing of a file fails. Valid options are:
You can override the output directory path to be used by setting values in the current message. For more information, see the Request tab properties. outputDirectoryFile name or patternNoYesNoneSpecify a file name pattern. This property defines the name of the file that is created by the FileOutput node. The value is either a specific file name or a character sequence (pattern) that matches a file name. Only patterns with a single wildcard character (the asterisk, *) are allowed in this property field. The file name to be used is determined in the following way:
File names are passed to the file system to which the integration node has access and must adhere to the conventions of these file systems. For example, file names on Windows systems are not case-sensitive; while on UNIX systems, they are. outputFilenameMode for writing to fileYesNoStage in transit directorySpecify if the file must be staged or written to directly. Select one of the following options:
By default, this check box is cleared. If this check box is not selected, and there is already a file in the archive directory with the same name as a file that is to be moved there, an exception is produced, and the new file remains in the transit directory. The FileOutput node Request properties are described in the following table. These properties specify the location of the data to be written, and control information that overrides the Directory and File name or pattern properties on the Basic tab. You can specify the properties on this tab as XPath or ESQL expressions. Content assist is available in the properties pane and also in the XPath Expression Builder, which you can open by using the Edit button to the right of each property. PropertyMCDefaultDescriptionmqsiapplybaroverride command propertyData locationYesNo$BodySpecify the input data location, which is the location in the input message tree that contains the record to be written to the output file. The default value is $Body, meaning the entire message body ($InputRoot.Body). When you specify this property, and the data in the message tree that it identifies is owned by a model-driven parser, such as the MRM parser or XMLNSC parser, consider the following factors.
The FileOutput node Records and Elements properties are described in the following table. These properties specify how the FileOutput node writes the record derived from the message. PropertyMCDefaultDescriptionRecord definitionYesNoRecord is Whole FileSpecify how the records are placed in the output file. Select one of the following options:
The FileOutput node Validation properties are described in the following table. For a full description of these properties, see Validation properties. PropertyMCDefaultDescriptionmqsiapplybaroverride command propertyValidateNoYesInheritSpecify whether validation takes place. Valid values are:
The FileOutput node FTP properties are described in the following table. To transfer files to an FTP, FTPS, or SFTP server, select the Remote Transfer property, then set the properties described in this table. PropertyMCDefaultDescriptionmqsiapplybaroverride command propertyRemote transferNoYesClearedTo transfer files to an FTP, FTPS, or SFTP server, select Remote Transfer, then set the other properties in this table.fileFtpTransfer protocolNoYesFTPThis property specifies the protocol to be used for remote transfer. Valid values are:
Specify the IP address and port number of the FTP, FTPS, or SFTP server to be used, by using the following syntax:
You can override this property by setting the location of the server in the local environment. For more details, see Local environment overrides for the remote server on the FileOutput node. fileFtpServerSecurity identityNoYesNoneSpecify the name of a security identity that has been defined by using the mqsisetdbparms command. The user identifier and password that are to be used to log on to the FTP, FTPS, or SFTP server are obtained from this definition. The name of the definition must have the prefixftp:: . The value of this property is overridden by the value in the FtpServer configurable service property securityIdentity, if it is set.fileFtpUserServer directoryNoYes"."Specify the directory on the FTP, FTPS, or SFTP server to which to transfer files. The default value is . (a period), which indicates the default directory after logon. If you specify a relative path, the directory is based on the default directory after FTP, FTPS, or SFTP logon. Ensure that the syntax of the path conforms to the file system standards in the FTP, FTPS, or SFTP server. The value of this property is overridden by the value in the remoteDirectory property of the FtpServer configurable service, if it is set. If the directory specified in this field does not exist on the remote server, the node attempts to create it.
Which of the following file mode is used to append to end of file?"Appending" means adding something to the end of another thing. The "a" mode allows you to open a file to append some content to it. And we want to add a new line to it, we can open it using the "a" mode (append) and then, call the write() method, passing the content that we want to append as argument.
Which mode is used to retain its previous data and allowing to add new data?On the other NOTES 2022-23 Page 6 COMPUTER SCIENCE - CLASS XII 24 hand, in append mode, new data will be added at the end of the previous data as the file object is at the end of the file.
Which of the following access mode is used for opening a file for appending in the binary format?To open a file in binary format, add 'b' to the mode parameter. Hence the "rb" mode opens the file in binary format for reading, while the "wb" mode opens the file in binary format for writing.
Which among following is used to append the content to the current content of the file?appendFile() method is used to append the specified content to a file. If the file does not exist, it creates the file.
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