TM Error Logger

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Provides the API for accessing and processing data stored in a data source (usually a relational database) using the Java

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TM programming language. This API includes a framework whereby differentdrivers can be installed dynamically to access different data sources.Although the JDBCTM API is mainly geared to passing SQL statements to a database, it provides for reading andwriting data from any data source with a tabular format.The reader/writer facility, available through the javax.sql.RowSet group of interfaces, can be customized touse and update data from a spread sheet, flat file, or any other tabular data source.

Run TM Error Logger after you get the Time Machine error and you will get a report showing which file or folder caused the error. Click on 'Open Problem Folder' to reveal the folder containing the problem. TM Error Logger will poll the system log every 30 minutes looking for Time Machine Errors.

What the JDBCTM 4.1 API Includes

The JDBCTM 4.1 API includes boththe java.sql package, referred to as the JDBC core API,and the javax.sql package, referred to as the JDBC OptionalPackage API. This complete JDBC APIis included in the JavaTM Standard Edition (Java SETM), version 7.The javax.sql package extends the functionality of the JDBC API from a client-side API to a server-side API, and it is an essential partof the JavaTM Enterprise Edition(Java EETM) technology.

Versions

The JDBC 4.1 API incorporates all of the previous JDBC API versions:
  • The JDBC 4.0 API
  • The JDBC 3.0 API
  • The JDBC 2.1 core API
  • The JDBC 2.0 Optional Package API
    (Note that the JDBC 2.1 core API and the JDBC 2.0 Optional Package API together are referred to as the JDBC 2.0 API.)
  • The JDBC 1.2 API
  • The JDBC 1.0 API

Classes, interfaces, methods, fields, constructors, and exceptions have the following 'since' tags that indicate when they were introduced into the Java platform. When these 'since' tags are used inJavadocTM comments for the JDBC API,they indicate the following:

  • Since 1.7 -- new in the JDBC 4.1 API and part of the Java SE platform, version 7
  • Since 1.6 -- new in the JDBC 4.0 API and part of the Java SE platform, version 6
  • Since 1.4 -- new in the JDBC 3.0 API and part of the J2SE platform, version 1.4
  • Since 1.2 -- new in the JDBC 2.0 API and part of the J2SE platform, version 1.2
  • Since 1.1 or no 'since' tag -- in the original JDBC 1.0 API and part of the JDKTM, version 1.1

NOTE: Many of the new features are optional; consequently, there is some variation in drivers and the features they support. Always check your driver's documentation to see whether it supports a feature beforeyou try to use it.

NOTE: The class SQLPermission was added in theJavaTM 2 SDK, Standard Edition, version 1.3 release. This class is used to prevent unauthorizedaccess to the logging stream associated with the DriverManager,which may contain information such as table names, column data, and so on.

What the java.sql Package Contains

The java.sql package contains API for the following:
  • Making a connection with a database via the DriverManager facility
    • DriverManager class -- makes a connection with a driver
    • SQLPermission class -- provides permission when code running within a Security Manager, such as an applet, attempts to set up a logging stream through the DriverManager
    • Driver interface -- provides the API for registering and connecting drivers based on JDBC technology ('JDBC drivers'); generally used only by the DriverManager class
    • DriverPropertyInfo class -- provides properties for a JDBC driver; not used by the general user
  • Sending SQL statements to a database
    • Statement -- used to send basic SQL statements
    • PreparedStatement -- used to send prepared statements or basic SQL statements (derived from Statement)
    • CallableStatement -- used to call database stored procedures (derived from PreparedStatement)
    • Connection interface -- provides methods for creating statements and managing connections and their properties
    • Savepoint -- provides savepoints in a transaction
  • Retrieving and updating the results of a query
    • ResultSet interface
  • Standard mappings for SQL types to classes and interfaces in the Java programming language
    • Array interface -- mapping for SQL ARRAY
    • Blob interface -- mapping for SQL BLOB
    • Clob interface -- mapping for SQL CLOB
    • Date class -- mapping for SQL DATE
    • NClob interface -- mapping for SQL NCLOB
    • Ref interface -- mapping for SQL REF
    • RowId interface -- mapping for SQL ROWID
    • Struct interface -- mapping for SQL STRUCT
    • SQLXML interface -- mapping for SQL XML
    • Time class -- mapping for SQL TIME
    • Timestamp class -- mapping for SQL TIMESTAMP
    • Types class -- provides constants for SQL types
  • Custom mapping an SQL user-defined type (UDT) to a class in the Java programming language
    • SQLData interface -- specifies the mapping of a UDT to an instance of this class
    • SQLInput interface -- provides methods for reading UDT attributes from a stream
    • SQLOutput interface -- provides methods for writing UDT attributes back to a stream
  • Metadata
    • DatabaseMetaData interface -- provides information about the database
    • ResultSetMetaData interface -- provides information about the columns of a ResultSet object
    • ParameterMetaData interface -- provides information about the parameters to PreparedStatement commands
  • Exceptions
    • SQLException -- thrown by most methods when there is a problem accessing data and by some methods for other reasons
    • SQLWarning -- thrown to indicate a warning
    • DataTruncation -- thrown to indicate that data may have been truncated
    • BatchUpdateException -- thrown to indicate that not all commands in a batch update executed successfully

java.sql and javax.sql Features Introduced in the JDBC 4.1 API

  • Allow Connection, ResultSet and Statement objects to be used with the try-with-resources statement
  • Supported added to CallableStatement and ResultSet to specify the Java type to convert to via the getObject method
  • DatabaseMetaData methods to return PseudoColumns and if a generated key is always returned
  • Added support to Connection to specify a database schema, abort and timeout a physical connection.
  • Added support to close a Statement object when its dependent objects have been closed
  • Support for obtaining the parent logger for a Driver, DataSource, ConnectionPoolDataSource and XADataSource
Tsm error log

java.sql and javax.sql Features Introduced in the JDBC 4.0 API

  • auto java.sql.Driver discovery -- no longer need to load a java.sql.Driver class via Class.forName
  • National Character Set support added
  • Support added for the SQL:2003 XML data type
  • SQLException enhancements -- Added support for cause chaining; New SQLExceptions added for common SQLState class value codes
  • Enhanced Blob/Clob functionality -- Support provided to create and free a Blob/Clob instance as well as additional methods added to improve accessiblity
  • Support added for accessing a SQL ROWID
  • Support added to allow a JDBC application to access an instance of a JDBC resource that has been wrapped by a vendor, usually in an application server or connection pooling environment.
  • Availability to be notified when a PreparedStatement that is associated with a PooledConnection has been closed or the driver determines is invalid

java.sql and javax.sql Features Introduced in the JDBC 3.0 API

  • Pooled statements -- reuse of statements associated with a pooled connection
  • Savepoints -- allow a transaction to be rolled back to a designated savepoint
  • Properties defined for ConnectionPoolDataSource -- specify how connections are to be pooled
  • Metadata for parameters of a PreparedStatement object
  • Ability to retrieve values from automatically generated columns
  • Ability to have multiple ResultSet objects returned from CallableStatement objects open at the same time
  • Ability to identify parameters to CallableStatement objects by name as well as by index
  • ResultSet holdability -- ability to specify whether cursors should be held open or closed at the end of a transaction
  • Ability to retrieve and update the SQL structured type instance that a Ref object references
  • Ability to programmatically update BLOB, CLOB, ARRAY, and REF values.
  • Addition of the java.sql.Types.DATALINK data type -- allows JDBC drivers access to objects stored outside a data source
  • Addition of metadata for retrieving SQL type hierarchies

java.sql Features Introduced in the JDBC 2.1 Core API

  • Scrollable result sets--using new methods in the ResultSet interface that allow the cursor to be moved to a particular row or to a position relative to its current position
  • Batch updates
  • Programmatic updates--using ResultSet updater methods
  • New data types--interfaces mapping the SQL3 data types
  • Custom mapping of user-defined types (UDTs)
  • Miscellaneous features, including performance hints, the use of character streams, full precision for java.math.BigDecimal values, additional security, and support for time zones in date, time, and timestamp values.

javax.sql Features Introduced in the JDBC 2.0 OptionalPackage API

  • The DataSource interface as a means of making a connection. The Java Naming and Directory InterfaceTM (JNDI) is used for registering a DataSource object with a naming service and also for retrieving it.
  • Pooled connections -- allowing connections to be used and reused
  • Distributed transactions -- allowing a transaction to span diverse DBMS servers
  • RowSet technology -- providing a convenient means of handling and passing data

Custom Mapping of UDTs

A user-defined type (UDT) defined in SQL can be mapped to a class in the Javaprogramming language. An SQL structured type or an SQL DISTINCTtype are the UDTs that may be custom mapped. The following threesteps set up a custom mapping:
  1. Defining the SQL structured type or DISTINCT type in SQL
  2. Defining the class in the Java programming language to which the SQL UDT will be mapped. This class must implement the SQLData interface.
  3. Making an entry in a Connection object's type map that contains two things:
    • the fully-qualified SQL name of the UDT
    • the Class object for the class that implements the SQLData interface

When these are in place for a UDT, calling the methodsResultSet.getObject or CallableStatement.getObject on that UDT will automatically retrieve the custom mapping for it. Also, thePreparedStatement.setObject method will automatically map theobject back to its SQL type to store it in the data source.

Package Specification

Tsm Error Log

Related Documentation

  • Getting Started--overviews of the major interfaces
  • Chapters on the JDBC API--from the online version of The Java Tutorial Continued
  • JDBCTMAPI Tutorial and Reference, Third Edition--a complete reference and tutorial for the JDBC 3.0 API

At a Glance

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Our Verdict

I don’t know about you, but my Mac displays a message similar to this one all too frequently:

Thanks, Apple. I mean, it’s good to know that my expected Time Machine backup didn’t complete, but couldn’t you be a bit more helpful? Like, say, telling me which file(s) caused the problem, or which file(s) couldn’t be backed up?

Until Apple fixes this flaw in Time Machine, you’re on your own. Savvy OS X users know you can get a better idea of what went wrong by opening the Console utility (in /Applications/Utilities) and searching the All Messages view for instances of backupd until you find one or more log entries containing an error. But for those looking for an easier solution, Carnation Software’s TM Error Logger can help.

Whenever you see a Time Machine error on your screen, just launch TM Error Logger. The utility displays any Time Machine-related errors from the current system log. (This log is automatically archived each day, so the current log will usually show only errors for the current day.)

For example, I used TM Error Logger yesterday afternoon after my third Time Machine error of the day. TM Error Logger’s window, essentially a filtered version of the aforementioned All Messages view, shows only Time Machine-related data—specifically, all errors so far that day, as well as the log entry for the most-recent successful backup. Each error message shows the path to the file that could not be copied or otherwise prevented your backup from completing.

You can use these error messages in a couple ways. Sometimes—especially with frequently-updated data such as iCal calendar files—the problem is likely that the file in question was already in use. For example, a MobileMe sync was in progress, so a calendar file was being updated at the instant Time Machine wanted to back it up. If the next time Time Machine runs, it doesn’t have a problem with the same file, that means the file was successfully backed up and there’s no need for concern.

On the other hand, if Time Machine repeatedly has a problem with the same file, there’s a good chance the file itself is damaged, or that your hard drive’s directory is having problems. If the file is unimportant, you can delete it and try backing up again to see if the error no longer appears. Alternatively, you can run Disk Utility or another disk-repair utility to see if it can fix the problem.

Buttons at the bottom of the TM Error Logger window let you quickly refresh the current log; view the previous log (presumably the one from the previous day); manually start a Time Machine backup; open the Time Machine pane of System Preferences; view a list of common error codes; and more. One of the most-useful buttons opens the folder containing the most-recent problem file, making it easier to inspect or delete that file.

Tm Error Logger Windows 10

While TM Error Logger is useful, it can also feel kludgy. Sometimes the Open Problem Folder button doesn’t work, there are some minor graphics issues with the program’s window, and its presentation of errors could use some polish. It’s also only as good as the logs OS X keeps.

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