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package com.unboundid.directory.sdk.examples;
import java.util.Arrays;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import com.unboundid.directory.sdk.common.api.FileBasedErrorLogger;
import com.unboundid.directory.sdk.common.config.FileBasedErrorLoggerConfig;
import com.unboundid.directory.sdk.common.types.LogCategory;
import com.unboundid.directory.sdk.common.types.LogSeverity;
import com.unboundid.directory.sdk.common.types.ServerContext;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.args.ArgumentException;
import com.unboundid.util.args.ArgumentParser;
/**
* This class provides a simple example of a file-based error logger that will
* format a provided set of error log messages. It does not require any
* configuration arguments.
*/
public final class ExampleFileBasedErrorLogger
extends FileBasedErrorLogger
{
/**
* Creates a new instance of this file-based error logger. All file-based
* error logger implementations must include a default constructor, but any
* initialization should generally be done in the
* {@code initializeErrorLogger} method.
*/
public ExampleFileBasedErrorLogger()
{
// No implementation required.
}
/**
* Retrieves a human-readable name for this extension.
*
* @return A human-readable name for this extension.
*/
@Override()
public String getExtensionName()
{
return "Example File-Based Error Logger";
}
/**
* Retrieves a human-readable description for this extension. Each element
* of the array that is returned will be considered a separate paragraph in
* generated documentation.
*
* @return A human-readable description for this extension, or {@code null}
* or an empty array if no description should be available.
*/
@Override()
public String[] getExtensionDescription()
{
return new String[]
{
"This error logger serves an example that may be used to demonstrate " +
"the process for creating a third-party file-based error " +
"logger. It will generate a simple log message for each kind of " +
"interaction with the client."
};
}
/**
* Updates the provided argument parser to define any configuration arguments
* which may be used by this error logger. The argument parser may also
* be updated to define relationships between arguments (e.g., to specify
* required, exclusive, or dependent argument sets).
*
* @param parser The argument parser to be updated with the configuration
* arguments which may be used by this error logger.
*
* @throws ArgumentException If a problem is encountered while updating the
* provided argument parser.
*/
@Override()
public void defineConfigArguments(final ArgumentParser parser)
throws ArgumentException
{
// This logger does not require any configuration arguments.
}
/**
* Initializes this error logger.
*
* @param serverContext A handle to the server context for the server in
* which this extension is running.
* @param config The general configuration for this error logger.
* @param parser The argument parser which has been initialized from
* the configuration for this error logger.
*
* @throws LDAPException If a problem occurs while initializing this error
* logger.
*/
@Override()
public void initializeErrorLogger(final ServerContext serverContext,
final FileBasedErrorLoggerConfig config,
final ArgumentParser parser)
throws LDAPException
{
// No initialization is required. All of the work of setting up the log
// file writer and registering as a disk space consumer will be handled by
// the server.
}
/**
* Indicates whether the configuration contained in the provided argument
* parser represents a valid configuration for this extension.
*
* @param config The general configuration for this error
* logger.
* @param parser The argument parser which has been initialized
* with the proposed configuration.
* @param unacceptableReasons A list that can be updated with reasons that
* the proposed configuration is not acceptable.
*
* @return {@code true} if the proposed configuration is acceptable, or
* {@code false} if not.
*/
@Override()
public boolean isConfigurationAcceptable(
final FileBasedErrorLoggerConfig config,
final ArgumentParser parser,
final List<String> unacceptableReasons)
{
// No special validation is required, so we don't need to do anything here.
return true;
}
/**
* Attempts to apply the configuration contained in the provided argument
* parser.
*
* @param config The general configuration for this error
* logger.
* @param parser The argument parser which has been
* initialized with the new configuration.
* @param adminActionsRequired A list that can be updated with information
* about any administrative actions that may be
* required before one or more of the
* configuration changes will be applied.
* @param messages A list that can be updated with information
* about the result of applying the new
* configuration.
*
* @return A result code that provides information about the result of
* attempting to apply the configuration change.
*/
@Override()
public ResultCode applyConfiguration(final FileBasedErrorLoggerConfig config,
final ArgumentParser parser,
final List<String> adminActionsRequired,
final List<String> messages)
{
// This logger does not define any custom configuration arguments, so no
// action is required.
return ResultCode.SUCCESS;
}
/**
* Performs any cleanup which may be necessary when this error logger is
* to be taken out of service.
*/
@Override()
public void finalizeErrorLogger()
{
// All work required for shutting down the log writer will be handled by
// the server, and no other finalization is required.
}
/**
* Records information about the provided message, if appropriate.
*
* @param category The category for the message to be logged.
* @param severity The severity for the message to be logged.
* @param messageID The unique identifier with which the message text is
* associated.
* @param message The message to be logged.
*
* @return The content of the message that should be logged.
*/
@Override()
public CharSequence logError(final LogCategory category,
final LogSeverity severity, final long messageID,
final String message)
{
final StringBuilder buffer = new StringBuilder();
buffer.append(new Date());
buffer.append(" severity=");
buffer.append(severity.name());
buffer.append(" message=\"");
buffer.append(message);
buffer.append('"');
return buffer;
}
/**
* Retrieves a map containing examples of configurations that may be used for
* this extension. The map key should be a list of sample arguments, and the
* corresponding value should be a description of the behavior that will be
* exhibited by the extension when used with that configuration.
*
* @return A map containing examples of configurations that may be used for
* this extension. It may be {@code null} or empty if there should
* not be any example argument sets.
*/
@Override()
public Map<List<String>,String> getExamplesArgumentSets()
{
final LinkedHashMap<List<String>,String> exampleMap =
new LinkedHashMap<List<String>,String>(1);
exampleMap.put(
Arrays.<String>asList(),
"Write error log messages to the associated log file.");
return exampleMap;
}
}
