Package com.google.cloud.logging

Interface Logging

    • Method Detail

      • setWriteSynchronicity

        void setWriteSynchronicity​(Synchronicity synchronicity)
        Sets synchronicity Synchronicity of logging writes, defaults to asynchronous.

      • getWriteSynchronicity

        Synchronicity getWriteSynchronicity()
        Retrieves current set synchronicity Synchronicity of logging writes.

      • setFlushSeverity

        void setFlushSeverity​(Severity flushSeverity)
        Sets flush severity for asynchronous logging writes. It is disabled by default, enabled when this method is called with any Severity value other than Severity.NONE. Logs will be immediately written out for entries at or higher than flush severity.

        Enabling this can cause the leaking and hanging threads, see BUG(2796) BUG(3880). However you can explicitly call flush().

        TODO: Enable this by default once functionality to trigger rpc is available in generated code.

      • getFlushSeverity

        Severity getFlushSeverity()

      • create

        Sink create​(SinkInfo sink)
        Creates a new sink.

        Example of creating a sink to export logs to a BigQuery dataset (in the ServiceOptions.getProjectId() project). 

         {
   @code
   String sinkName = "my_sink_name";
   String datasetName = "my_dataset";
   SinkInfo sinkInfo = SinkInfo.of(sinkName, DatasetDestination.of(datasetName));
   Sink sink = logging.create(sinkInfo);
 }
        Returns:
        the created sink
        Throws:
        LoggingException - upon failure

      • create

        Metric create​(MetricInfo metric)
        Creates a new metric.

        Example of creating a metric for logs with severity higher or equal to ERROR. 

         {
   @code
   String metricName = "my_metric_name";
   MetricInfo metricInfo = MetricInfo.of(metricName, "severity>=ERROR");
   Metric metric = logging.create(metricInfo);
 }
        Returns:
        the created metric
        Throws:
        LoggingException - upon failure

      • create

        Exclusion create​(Exclusion exclusion)
        Creates a new exclusion in a specified parent resource. Only log entries belonging to that resource can be excluded. You can have up to 10 exclusions in a resource.

        Example of creating the exclusion: 

         {
   @code
   String exclusionName = "my_exclusion_name";
   Exclusion exclusion = Exclusion.of(exclusionName,
       "resource.type=gcs_bucket severity<ERROR sample(insertId, 0.99)");
   Exclusion exclusion = logging.create(exclusion);
 }
        Returns:
        the created exclusion
        Throws:
        LoggingException - upon failure

      • createAsync

        com.google.api.core.ApiFuture<Sink> createAsync​(SinkInfo sink)
        Sends a request for creating a sink. This method returns a ApiFuture object to consume the result. Future.get() returns the created sink.

        Example of asynchronously creating a sink to export logs to a BigQuery dataset (in the ServiceOptions.getProjectId() project). 

        
 String sinkName = "my_sink_name";
 String datasetName = "my_dataset";
 SinkInfo sinkInfo = SinkInfo.of(sinkName, DatasetDestination.of(datasetName));
 ApiFuture<Sink> future = logging.createAsync(sinkInfo);
 // ...
 Sink sink = future.get();

      • createAsync

        com.google.api.core.ApiFuture<Metric> createAsync​(MetricInfo metric)
        Sends a request for creating a metric. This method returns a ApiFuture object to consume the result. Future.get() returns the created metric.

        Example of asynchronously creating a metric for logs with severity higher or equal to ERROR. 

        
 String metricName = "my_metric_name";
 MetricInfo metricInfo = MetricInfo.of(metricName, "severity>=ERROR");
 ApiFuture<Metric> future = logging.createAsync(metricInfo);
 // ...
 Metric metric = future.get();

      • createAsync

        com.google.api.core.ApiFuture<Exclusion> createAsync​(Exclusion exclusion)
        Sends a request to create the exclusion. This method returns an ApiFuture object to consume the result. Future.get() returns the created exclusion.

        Example of asynchronously creating the exclusion: 

        
 String exclusionName = "my_exclusion_name";
 Exclusion exclusion = Exclusion.of(exclusionName,
     "resource.type=gcs_bucket severity<ERROR sample(insertId, 0.99)");
 ApiFuture<Exclusion> future = logging.createAsync(exclusion);
 // ...
 Exclusion exclusion = future.get();

      • update

        Sink update​(SinkInfo sink)
        Updates a sink or creates one if it does not exist.

        Example of updating a sink. 

        
 String sinkName = "my_sink_name";
 String datasetName = "my_dataset";
 SinkInfo sinkInfo = SinkInfo.newBuilder(sinkName, DatasetDestination.of(datasetName))
     .setVersionFormat(SinkInfo.VersionFormat.V2).setFilter("severity>=ERROR").build();
 Sink sink = logging.update(sinkInfo);
        Returns:
        the created sink
        Throws:
        LoggingException - upon failure

      • update

        Metric update​(MetricInfo metric)
        Updates a metric or creates one if it does not exist.

        Example of updating a metric. 

        
 String metricName = "my_metric_name";
 MetricInfo metricInfo = MetricInfo.newBuilder(metricName, "severity>=ERROR").setDescription("new description")
     .build();
 Metric metric = logging.update(metricInfo);
        Returns:
        the created metric
        Throws:
        LoggingException - upon failure

      • update

        Exclusion update​(Exclusion exclusion)
        Updates one or more properties of an existing exclusion.

        Example of updating the exclusion: 

        
 String exclusionName = "my_exclusion_name";
 Exclusion exclusion = Exclusion
     .newBuilder(exclusionName, "resource.type=gcs_bucket severity<ERROR sample(insertId, 0.99)")
     .setDescription("new description").setIsDisabled(false).build();
 Exclusion exclusion = logging.update(exclusion);
        Returns:
        the updated exclusion
        Throws:
        LoggingException - upon failure

      • updateAsync

        com.google.api.core.ApiFuture<Sink> updateAsync​(SinkInfo sink)
        Sends a request for updating a sink (or creating it, if it does not exist). This method returns a ApiFuture object to consume the result. Future.get() returns the updated/created sink or null if not found.

        Example of asynchronously updating a sink. 

        
 String sinkName = "my_sink_name";
 String datasetName = "my_dataset";
 SinkInfo sinkInfo = SinkInfo.newBuilder(sinkName, DatasetDestination.of(datasetName))
     .setVersionFormat(SinkInfo.VersionFormat.V2).setFilter("severity>=ERROR").build();
 ApiFuture<Sink> future = logging.updateAsync(sinkInfo);
 // ...
 Sink sink = future.get();

      • updateAsync

        com.google.api.core.ApiFuture<Metric> updateAsync​(MetricInfo metric)
        Sends a request for updating a metric (or creating it, if it does not exist). This method returns a ApiFuture object to consume the result. Future.get() returns the updated/created metric or null if not found.

        Example of asynchronously updating a metric. 

        
 String metricName = "my_metric_name";
 MetricInfo metricInfo = MetricInfo.newBuilder(metricName, "severity>=ERROR").setDescription("new description")
     .build();
 ApiFuture<Metric> future = logging.updateAsync(metricInfo);
 // ...
 Metric metric = future.get();

      • updateAsync

        com.google.api.core.ApiFuture<Exclusion> updateAsync​(Exclusion exclusion)
        Sends a request to change one or more properties of an existing exclusion. This method returns an ApiFuture object to consume the result. Future.get() returns the updated exclusion or null if not found.

        Example of asynchronous exclusion update: 

        
 String exclusionName = "my_exclusion_name";
 Exclusion exclusion = Exclusion
     .newBuilder(exclusionName, "resource.type=gcs_bucket severity<ERROR sample(insertId, 0.99)")
     .setDescription("new description").setIsDisabled(false).build();
 ApiFuture<Exclusion> future = logging.updateAsync(exclusion);
 // ...
 Exclusion exclusion = future.get();

      • getSink

        Sink getSink​(String sink)
        Returns the requested sink or null if not found.

        Example of getting a sink. 

        
 String sinkName = "my_sink_name";
 Sink sink = logging.getSink(sinkName);
 if (sink == null) {
   // sink was not found
 }
        Throws:
        LoggingException - upon failure

      • getSinkAsync

        com.google.api.core.ApiFuture<Sink> getSinkAsync​(String sink)
        Sends a request for getting a sink. This method returns a ApiFuture object to consume the result. Future.get() returns the requested sink or null if not found.

        Example of asynchronously getting a sink. 

        
 String sinkName = "my_sink_name";
 ApiFuture<Sink> future = logging.getSinkAsync(sinkName);
 // ...
 Sink sink = future.get();
 if (sink == null) {
   // sink was not found
 }
        Throws:
        LoggingException - upon failure

      • listSinks

        com.google.api.gax.paging.Page<Sink> listSinks​(Logging.ListOption... options)
        Lists the sinks. This method returns a Page object that can be used to consume paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing sinks.

        Example of listing sinks, specifying the page size. 

        
 Page<Sink> sinks = logging.listSinks(ListOption.pageSize(100));
 Iterator<Sink> sinkIterator = sinks.iterateAll().iterator();
 while (sinkIterator.hasNext()) {
   Sink sink = sinkIterator.next();
   // do something with the sink
 }
        Throws:
        LoggingException - upon failure

      • listSinksAsync

        com.google.api.core.ApiFuture<com.google.api.gax.paging.AsyncPage<Sink>> listSinksAsync​(Logging.ListOption... options)
        Sends a request for listing sinks. This method returns a ApiFuture object to consume the result. Future.get() returns an AsyncPage object that can be used to asynchronously handle paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing sinks.

        Example of asynchronously listing sinks, specifying the page size. 

        
 ApiFuture<AsyncPage<Sink>> future = logging.listSinksAsync(ListOption.pageSize(100));
 // ...
 AsyncPage<Sink> sinks = future.get();
 Iterator<Sink> sinkIterator = sinks.iterateAll().iterator();
 while (sinkIterator.hasNext()) {
   Sink sink = sinkIterator.next();
   // do something with the sink
 }

      • deleteSink

        boolean deleteSink​(String sink)
        Deletes the requested sink.

        Example of deleting a sink. 

        
 String sinkName = "my_sink_name";
 boolean deleted = logging.deleteSink(sinkName);
 if (deleted) {
   // the sink was deleted
 } else {
   // the sink was not found
 }
        Returns:
        true if the sink was deleted, false if it was not found

      • deleteSinkAsync

        com.google.api.core.ApiFuture<Boolean> deleteSinkAsync​(String sink)
        Sends a request for deleting a sink. This method returns a ApiFuture object to consume the result. Future.get() returns true if the sink was deleted, false if it was not found.

        Example of asynchronously deleting a sink. 

        
 String sinkName = "my_sink_name";
 ApiFuture<Boolean> future = logging.deleteSinkAsync(sinkName);
 // ...
 boolean deleted = future.get();
 if (deleted) {
   // the sink was deleted
 } else {
   // the sink was not found
 }

      • listLogs

        default com.google.api.gax.paging.Page<String> listLogs​(Logging.ListOption... options)
        Lists the log names. This method returns a Page object that can be used to consume paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing logs.

        Example of listing log names, specifying the page size. 

        
 Page<Log> logNames = logging.listLogs(ListOption.pageSize(100));
 Iterator<Log> logIterator = logNames.iterateAll().iterator();
 while (logIterator.hasNext()) {
   String logName = logIterator.next();
   // do something with the log name
 }
        Throws:
        LoggingException - upon failure

      • listLogsAsync

        default com.google.api.core.ApiFuture<com.google.api.gax.paging.AsyncPage<String>> listLogsAsync​(Logging.ListOption... options)
        Sends a request for listing log names. This method returns a ApiFuture object to consume the result. Future.get() returns an AsyncPage object that can be used to asynchronously handle paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing log names.

        Example of asynchronously listing log names, specifying the page size. 

        
 ApiFuture<AsyncPage<Log>> future = logging.listLogsAsync(ListOption.pageSize(100));
 // ...
 AsyncPage<Sink> logNames = future.get();
 Iterator<Sink> logIterator = logNames.iterateAll().iterator();
 while (logIterator.hasNext()) {
   String logName = logIterator.next();
   // do something with the log name
 }

      • deleteLog

        boolean deleteLog​(String log)
        Deletes a log and all its log entries. The log will reappear if new entries are written to it.

        Example of deleting a log. 

        
 String logName = "my_log_name";
 boolean deleted = logging.deleteLog(logName);
 if (deleted) {
   // the log was deleted
 } else {
   // the log was not found
 }
        Returns:
        true if the log was deleted, false if it was not found

      • deleteLog

        default boolean deleteLog​(String log,
                          LogDestinationName destination)
        Deletes a log and all its log entries for given log destination (see 'logName' parameter in https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry). The log will reappear if new entries are written to it.

        Example of deleting a log by folder destination. 

        
 String logName = "my_log_name";
 String folder = "my_folder";
 boolean deleted = logging.deleteLog(logName, LogDestinationName.folder(folder));
 if (deleted) {
   // the log was deleted
 } else {
   // the log was not found
 }
        Returns:
        true if the log was deleted, false if it was not found

      • deleteLogAsync

        default com.google.api.core.ApiFuture<Boolean> deleteLogAsync​(String log,
                                                              LogDestinationName destination)
        Sends a request for deleting a log and all its log entries for given log destination (see 'logName' parameter in https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry). This method returns a ApiFuture object to consume the result. Future.get() returns true if the log was deleted, false if it was not found.

        Example of asynchronously deleting a log by folder destination. 

        
 String logName = "my_log_name";
 String folder = "my_folder";
 ApiFuture<Boolean> future = logging.deleteLogAsync(logName, LogDestinationName.folder(folder));
 // ...
 boolean deleted = future.get();
 if (deleted) {
   // the log was deleted
 } else {
   // the log was not found
 }

      • deleteLogAsync

        com.google.api.core.ApiFuture<Boolean> deleteLogAsync​(String log)
        Sends a request for deleting a log and all its log entries. This method returns a ApiFuture object to consume the result. Future.get() returns true if the log was deleted, false if it was not found.

        Example of asynchronously deleting a log. 

        
 String logName = "my_log_name";
 ApiFuture<Boolean> future = logging.deleteLogAsync(logName);
 // ...
 boolean deleted = future.get();
 if (deleted) {
   // the log was deleted
 } else {
   // the log was not found
 }

      • listMonitoredResourceDescriptors

        com.google.api.gax.paging.Page<com.google.cloud.MonitoredResourceDescriptor> listMonitoredResourceDescriptors​(Logging.ListOption... options)
        Lists the monitored resource descriptors used by Cloud Logging. This method returns a Page object that can be used to consume paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing resource descriptors.

        Example of listing monitored resource descriptors, specifying the page size. 

        
 Page<MonitoredResourceDescriptor> descriptors = logging
     .listMonitoredResourceDescriptors(ListOption.pageSize(100));
 Iterator<MonitoredResourceDescriptor> descriptorIterator = descriptors.iterateAll().iterator();
 while (descriptorIterator.hasNext()) {
   MonitoredResourceDescriptor descriptor = descriptorIterator.next();
   // do something with the descriptor
 }
        Throws:
        LoggingException - upon failure

      • listMonitoredResourceDescriptorsAsync

        com.google.api.core.ApiFuture<com.google.api.gax.paging.AsyncPage<com.google.cloud.MonitoredResourceDescriptor>> listMonitoredResourceDescriptorsAsync​(Logging.ListOption... options)
        Sends a request for listing monitored resource descriptors used by Cloud Logging. This method returns a ApiFuture object to consume the result. Future.get() returns an AsyncPage object that can be used to asynchronously handle paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing resource descriptors.

        Example of asynchronously listing monitored resource descriptors, specifying the page size. 

        
 ApiFuture<AsyncPage<MonitoredResourceDescriptor>> future = logging
     .listMonitoredResourceDescriptorsAsync(ListOption.pageSize(100));
 // ...
 AsyncPage<MonitoredResourceDescriptor> descriptors = future.get();
 Iterator<MonitoredResourceDescriptor> descriptorIterator = descriptors.iterateAll().iterator();
 while (descriptorIterator.hasNext()) {
   MonitoredResourceDescriptor descriptor = descriptorIterator.next();
   // do something with the descriptor
 }

      • getMetric

        Metric getMetric​(String metric)
        Returns the requested metric or null if not found.

        Example of getting a metric. 

        
 String metricName = "my_metric_name";
 Metric metric = logging.getMetric(metricName);
 if (metric == null) {
   // metric was not found
 }
        Throws:
        LoggingException - upon failure

      • getMetricAsync

        com.google.api.core.ApiFuture<Metric> getMetricAsync​(String metric)
        Sends a request for getting a metric. This method returns a ApiFuture object to consume the result. Future.get() returns the requested metric or null if not found.

        Example of asynchronously getting a metric. 

        
 String metricName = "my_metric_name";
 ApiFuture<Metric> future = logging.getMetricAsync(metricName);
 // ...
 Metric metric = future.get();
 if (metric == null) {
   // metric was not found
 }
        Throws:
        LoggingException - upon failure

      • listMetrics

        com.google.api.gax.paging.Page<Metric> listMetrics​(Logging.ListOption... options)
        Lists the metrics. This method returns a Page object that can be used to consume paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing metrics.

        Example of listing metrics, specifying the page size. 

        
 Page<Metric> metrics = logging.listMetrics(ListOption.pageSize(100));
 Iterator<Metric> metricIterator = metrics.iterateAll().iterator();
 while (metricIterator.hasNext()) {
   Metric metric = metricIterator.next();
   // do something with the metric
 }
        Throws:
        LoggingException - upon failure

      • listMetricsAsync

        com.google.api.core.ApiFuture<com.google.api.gax.paging.AsyncPage<Metric>> listMetricsAsync​(Logging.ListOption... options)
        Sends a request for listing metrics. This method returns a ApiFuture object to consume the result. Future.get() returns an AsyncPage object that can be used to asynchronously handle paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing metrics.

        Example of asynchronously listing metrics, specifying the page size. 

        
 ApiFuture<AsyncPage<Metric>> future = logging.listMetricsAsync(ListOption.pageSize(100));
 // ...
 AsyncPage<Metric> metrics = future.get();
 Iterator<Metric> metricIterator = metrics.iterateAll().iterator();
 while (metricIterator.hasNext()) {
   Metric metric = metricIterator.next();
   // do something with the metric
 }

      • deleteMetric

        boolean deleteMetric​(String metric)
        Deletes the requested metric.

        Example of deleting a metric. 

        
 String metricName = "my_metric_name";
 boolean deleted = logging.deleteMetric(metricName);
 if (deleted) {
   // the metric was deleted
 } else {
   // the metric was not found
 }
        Returns:
        true if the metric was deleted, false if it was not found

      • deleteMetricAsync

        com.google.api.core.ApiFuture<Boolean> deleteMetricAsync​(String metric)
        Sends a request for deleting a metric. This method returns a ApiFuture object to consume the result. Future.get() returns true if the metric was deleted, false if it was not found.

        Example of asynchronously deleting a metric. 

        
 String metricName = "my_metric_name";
 ApiFuture<Boolean> future = logging.deleteMetricAsync(metricName);
 // ...
 boolean deleted = future.get();
 if (deleted) {
   // the metric was deleted
 } else {
   // the metric was not found
 }

      • getExclusion

        Exclusion getExclusion​(String exclusion)
        Gets the description of an exclusion or null if not found.

        Example of getting the description of an exclusion: 

        
 String exclusionName = "my_exclusion_name";
 Exclusion exclusion = logging.getExclusion(exclusionName);
 if (exclusion == null) {
   // exclusion was not found
 }
        Throws:
        LoggingException - upon failure

      • getExclusionAsync

        com.google.api.core.ApiFuture<Exclusion> getExclusionAsync​(String exclusion)
        Sends a request to get the description of an exclusion . This method returns an ApiFuture object to consume the result. Future.get() returns the requested exclusion or null if not found.

        Example of asynchronously getting the exclusion: 

        
 String exclusionName = "my_exclusion_name";
 ApiFuture<Exclusion> future = logging.getExclusionAsync(exclusionName);
 // ...
 Exclusion exclusion = future.get();
 if (exclusion == null) {
   // exclusion was not found
 }
        Throws:
        LoggingException - upon failure

      • deleteExclusion

        boolean deleteExclusion​(String exclusion)
        Deletes the requested exclusion.

        Example of deleting the exclusion: 

        
 String exclusionName = "my_exclusion_name";
 boolean deleted = logging.deleteExclusion(exclusionName);
 if (deleted) {
   // the exclusion was deleted
 } else {
   // the exclusion was not found
 }
        Returns:
        true if the exclusion was deleted, false if it was not found

      • deleteExclusionAsync

        com.google.api.core.ApiFuture<Boolean> deleteExclusionAsync​(String exclusion)
        Sends a request to delete an exclusion. This method returns an ApiFuture object to consume the result. Future.get() returns true if the exclusion was deleted, false if it was not found.

        Example of asynchronously deleting the exclusion: 

        
 String exclusionName = "my_exclusion_name";
 ApiFuture<Boolean> future = logging.deleteExclusionAsync(metricName);
 // ...
 boolean deleted = future.get();
 if (deleted) {
   // the exclusion was deleted
 } else {
   // the exclusion was not found
 }

      • listExclusions

        com.google.api.gax.paging.Page<Exclusion> listExclusions​(Logging.ListOption... options)
        Lists the exclusion. This method returns a Page object that can be used to consume paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing exclusion.

        Example of listing exclusions, specifying the page size: 

        
 Page<Exclusion> exclusions = logging.listMetrics(ListOption.pageSize(100));
 Iterator<Exclusion> exclusionIterator = exclusions.iterateAll().iterator();
 while (exclusionIterator.hasNext()) {
   Exclusion exclusion = exclusionIterator.next();
   // do something with the exclusion
 }
        Throws:
        LoggingException - upon failure

      • listExclusionsAsync

        com.google.api.core.ApiFuture<com.google.api.gax.paging.AsyncPage<Exclusion>> listExclusionsAsync​(Logging.ListOption... options)
        Sends a request for listing exclusions. This method returns an ApiFuture object to consume the result. Future.get() returns an AsyncPage object that can be used to asynchronously handle paginated results. Use Logging.ListOption to specify the page size or the page token from which to start listing exclusions.

        Example of asynchronously listing exclusions, specifying the page size: 

        
 ApiFuture<AsyncPage<Exclusion>> future = logging.listExclusionsAsync(ListOption.pageSize(100));
 // ...
 AsyncPage<Exclusion> exclusions = future.get();
 Iterator<Exclusion> exclusionIterator = exclusions.iterateAll().iterator();
 while (exclusionIterator.hasNext()) {
   Exclusion exclusion = exclusionIterator.next();
   // do something with the exclusion
 }

      • flush

        void flush()
        Flushes any pending asynchronous logging writes. Logs are automatically flushed based on time and message count that be configured via BatchingSettings, Logs are also flushed if enabled, at or above flush severity, see setFlushSeverity(com.google.cloud.logging.Severity). Logging frameworks require support for an explicit flush. See usage in the java.util.logging handlerLoggingHandler.

      • write

        void write​(Iterable<LogEntry> logEntries,
           Logging.WriteOption... options)
        Sends a request to log entries to Cloud Logging. Use Logging.WriteOption.logName(String) to provide a log name for those entries that do not specify one. Use Logging.WriteOption.resource(MonitoredResource) to provide a monitored resource for those entries that do not specify one. Use Logging.WriteOption.labels(Map) to provide some labels to be added to every entry in logEntries.

        Example of writing log entries and providing a default log name and monitored resource. 

        
 String logName = "my_log_name";
 List<LogEntry> entries = new ArrayList<>();
 entries.add(LogEntry.of(StringPayload.of("Entry payload")));
 Map<String, Object> jsonMap = new HashMap<>();
 jsonMap.put("key", "value");
 entries.add(LogEntry.of(JsonPayload.of(jsonMap)));
 logging.write(entries, WriteOption.logName(logName),
     WriteOption.resource(MonitoredResource.newBuilder("global").build()));

      • listLogEntriesAsync

        com.google.api.core.ApiFuture<com.google.api.gax.paging.AsyncPage<LogEntry>> listLogEntriesAsync​(Logging.EntryListOption... options)
        Sends a request for listing log entries. This method returns a ApiFuture object to consume the result. Future.get() returns an AsyncPage object that can be used to asynchronously handle paginated results. Use Logging.EntryListOption.pageSize(int) to specify the page size. Use Logging.EntryListOption.pageToken(String) to specify the page token from which to start listing entries. Use Logging.EntryListOption.sortOrder(SortingField, SortingOrder) to sort log entries according to your preferred order (default is most-recent last). Use Logging.EntryListOption.filter(String) to filter listed log entries. By default a 24 hour filter is applied.

        Example of asynchronously listing log entries for a specific log. 

        
 String filter = "logName=projects/my_project_id/logs/my_log_name";
 ApiFuture<AsyncPage<LogEntry>> future = logging.listLogEntriesAsync(EntryListOption.filter(filter));
 // ...
 AsyncPage<LogEntry> entries = future.get();
 Iterator<LogEntry> entryIterator = entries.iterateAll().iterator();
 while (entryIterator.hasNext()) {
   LogEntry entry = entryIterator.next();
   // do something with the entry
 }
        Throws:
        LoggingException - upon failure

      • tailLogEntries

        @BetaApi("The surface for the tail streaming is not stable yet and may change in the future.")
LogEntryServerStream tailLogEntries​(Logging.TailOption... options)
        Sends a request to stream fresh log entries. The method returns a LogEntryServerStream object to iterate through the returned stream of the log entries. Use EntryListOption#bufferWindow(String)} to specify amount of time to buffer log entries at the server before being returned. entries. Use Logging.TailOption.filter(String) to filter tailed log entries.

        Example of streaming log entries for a specific project. 

        
 LogEntryServerStream stream = logging.tailLogEntries(TailOption.project("my_project_id"));
 Iterator<LogEntry> it = stream.iterator();
 while (it.hasNext()) {
   // do something with entry
   // call stream.cancel(); to stop streaming
 }

      • populateMetadata

        default Iterable<LogEntry> populateMetadata​(Iterable<LogEntry> logEntries,
                                            com.google.cloud.MonitoredResource customResource,
                                            String... exclusionClassPaths)
        Populates metadata fields of the immutable collection of LogEntry items. Only empty fields are populated. The SourceLocation is populated only for items with the severity set to Severity.DEBUG. The information about HttpRequest, trace and span Id is retrieved using ContextHandler.
        Parameters:
        logEntries - an immutable collection of LogEntry items.
        customResource - a customized instance of the MonitoredResource. If this parameter is null then the new instance will be generated using MonitoredResourceUtil.getResource(String, String).
        exclusionClassPaths - a list of exclussion class path prefixes. If left empty then SourceLocation instance is built based on the caller's stack trace information. Otherwise, the information from the first StackTraceElement along the call stack which class name does not start with any not null exclusion class paths is used.
        Returns:
        A collection of LogEntry items composed from the logEntries parameter with populated metadata fields.