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$logger->internal("Something happened here are all the gory details.")
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$logger->debug("Something happened here are some more details.") $logger->warn("Hmm, something bad might have happened.") $logger->error("Hmm, something bad DEFINITELY happened!") The following example exercises all of the available logging levels in OpenSRF:
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You can include many calls to the OpenSRF logger only those that are higher than your configured logging level will actually hit the log. To add logging to our Perl example, we just have to add the OpenSRF::Utils::Logger package to our list of used Perl modules, then invoke the logger at the desired logging level.
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The destination of the log files, and the level of verbosity to be logged, is set in the opensrf_core.xml configuration file. The service language bindings for OpenSRF include integrated support for logging messages at the levels of ERROR, WARNING, INFO, DEBUG, and the extremely verbose INTERNAL to either a local file or to a syslogger service. Registering the method as a streaming method instructs OpenSRF to also register an atomic variant ( ).Īs hard as it may be to believe, it is true: applications sometimes do not behave in the expected manner, particularly when they are still under development.Rather than returning a reference to the array, a streaming method loops over the contents of the array and invokes the respond() method of the connection object on each element of the array.In the following example, the text splitting method has been reimplemented to support streaming very few changes are required: Text splitting method – streaming mode atomic variant gathers all of the results into a single block to return to the client, giving the caller the ability to choose either streaming or atomic results from a single method definition. In addition to registering the method with the provided name, OpenSRF also registers an additional method with. If the method returns results that can be divided into separate meaningful units, you can register the OpenSRF method as a streaming method and enable the client to loop over the results one unit at a time until the method returns no further results. OpenSRF offers a solution to this problem. The client would be forced to block until all of the results are returned, likely resulting in a significant delay, and depending on the implementation, correspondingly large amounts of memory might be consumed as all of the results are read from the network in a single block. Consider a service that returns a set of bibliographic records in response to a query like “all records edited in the past month” if the underlying database is relatively active, that could result in thousands of records being returned as a single network request. For small values being delivered over the network, this is perfectly acceptable, but for large sets of values this can pose a number of problems for the requesting client. In the previous implementation of the method, we returned a reference to the complete array of results.
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