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Posted to commits@streampipes.apache.org by ze...@apache.org on 2020/04/30 07:11:24 UTC
[incubator-streampipes-extensions] branch dev updated: StringTimer
& StringCounter Processor
This is an automated email from the ASF dual-hosted git repository.
zehnder pushed a commit to branch dev
in repository https://gitbox.apache.org/repos/asf/incubator-streampipes-extensions.git
The following commit(s) were added to refs/heads/dev by this push:
new 436df47 StringTimer & StringCounter Processor
new e313c91 Merge pull request #11 from Madabaru/dev
436df47 is described below
commit 436df4795bf4f85ce3311f85a96ce4acd6bd557d
Author: Madabaru <jo...@axantu.com>
AuthorDate: Thu Apr 30 09:04:43 2020 +0200
StringTimer & StringCounter Processor
---
.../pe/jvm/AllPipelineElementsInit.java | 4 +
.../transformation/jvm/TransformationJvmInit.java | 6 +-
.../stringoperator/counter/StringCounter.java | 79 ++++++++++++++++++++
.../counter/StringCounterController.java | 71 ++++++++++++++++++
.../counter/StringCounterParameters.java | 36 +++++++++
.../stringoperator/timer/StringTimer.java | 72 ++++++++++++++++++
.../timer/StringTimerController.java | 83 +++++++++++++++++++++
.../timer/StringTimerParameters.java | 42 +++++++++++
.../documentation.md | 55 ++++++++++++++
.../icon.png | Bin 0 -> 16458 bytes
.../strings.en | 16 ++++
.../documentation.md | 54 ++++++++++++++
.../icon.png | Bin 0 -> 14398 bytes
.../strings.en | 17 +++++
14 files changed, 534 insertions(+), 1 deletion(-)
diff --git a/streampipes-pipeline-elements-all-jvm/src/main/java/org/apache/streampipes/pe/jvm/AllPipelineElementsInit.java b/streampipes-pipeline-elements-all-jvm/src/main/java/org/apache/streampipes/pe/jvm/AllPipelineElementsInit.java
index b27e745..987ee33 100644
--- a/streampipes-pipeline-elements-all-jvm/src/main/java/org/apache/streampipes/pe/jvm/AllPipelineElementsInit.java
+++ b/streampipes-pipeline-elements-all-jvm/src/main/java/org/apache/streampipes/pe/jvm/AllPipelineElementsInit.java
@@ -64,6 +64,8 @@ import org.apache.streampipes.processors.transformation.jvm.processor.booloperat
import org.apache.streampipes.processors.transformation.jvm.processor.booloperator.timekeeping.BooleanTimekeepingController;
import org.apache.streampipes.processors.transformation.jvm.processor.booloperator.timer.BooleanTimerController;
import org.apache.streampipes.processors.transformation.jvm.processor.csvmetadata.CsvMetadataEnrichmentController;
+import org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.counter.StringCounterController;
+import org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.timer.StringTimerController;
import org.apache.streampipes.processors.transformation.jvm.processor.task.TaskDurationController;
import org.apache.streampipes.processors.transformation.jvm.processor.timestampextractor.TimestampExtractorController;
import org.apache.streampipes.processors.transformation.jvm.processor.transformtoboolean.TransformToBooleanController;
@@ -145,6 +147,8 @@ public class AllPipelineElementsInit extends StandaloneModelSubmitter {
.add(new TaskDurationController())
.add(new BooleanInverterController())
.add(new TransformToBooleanController())
+ .add(new StringCounterController())
+ .add(new StringTimerController())
// streampipes-sinks-brokers-jvm
.add(new KafkaController())
.add(new JmsController())
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/TransformationJvmInit.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/TransformationJvmInit.java
index 08bd7d5..9da848f 100644
--- a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/TransformationJvmInit.java
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/TransformationJvmInit.java
@@ -34,6 +34,8 @@ import org.apache.streampipes.processors.transformation.jvm.processor.booloperat
import org.apache.streampipes.processors.transformation.jvm.processor.booloperator.timekeeping.BooleanTimekeepingController;
import org.apache.streampipes.processors.transformation.jvm.processor.booloperator.timer.BooleanTimerController;
import org.apache.streampipes.processors.transformation.jvm.processor.csvmetadata.CsvMetadataEnrichmentController;
+import org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.counter.StringCounterController;
+import org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.timer.StringTimerController;
import org.apache.streampipes.processors.transformation.jvm.processor.task.TaskDurationController;
import org.apache.streampipes.processors.transformation.jvm.processor.timestampextractor.TimestampExtractorController;
import org.apache.streampipes.processors.transformation.jvm.processor.transformtoboolean.TransformToBooleanController;
@@ -57,7 +59,9 @@ public class TransformationJvmInit extends StandaloneModelSubmitter {
.add(new CsvMetadataEnrichmentController())
.add(new TaskDurationController())
.add(new BooleanInverterController())
- .add(new TransformToBooleanController());
+ .add(new TransformToBooleanController())
+ .add(new StringTimerController())
+ .add(new StringCounterController());
DeclarersSingleton.getInstance().registerDataFormats(new JsonDataFormatFactory(),
new CborDataFormatFactory(),
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounter.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounter.java
new file mode 100644
index 0000000..a6a6a57
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounter.java
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.counter;
+
+import org.apache.streampipes.logging.api.Logger;
+import org.apache.streampipes.model.runtime.Event;
+import org.apache.streampipes.wrapper.context.EventProcessorRuntimeContext;
+import org.apache.streampipes.wrapper.routing.SpOutputCollector;
+import org.apache.streampipes.wrapper.runtime.EventProcessor;
+
+import java.util.HashMap;
+
+public class StringCounter implements EventProcessor<StringCounterParameters> {
+
+ private static Logger LOG;
+
+ private String selectedFieldName;
+ private String fieldValueOfLastEvent;
+
+ private HashMap<String, Integer> changeCounter;
+
+ @Override
+ public void onInvocation(StringCounterParameters stringCounterParametersParameters,
+ SpOutputCollector spOutputCollector,
+ EventProcessorRuntimeContext runtimeContext) {
+ LOG = stringCounterParametersParameters.getGraph().getLogger(StringCounter.class);
+ this.selectedFieldName = stringCounterParametersParameters.getSelectedFieldName();
+ this.fieldValueOfLastEvent = "";
+ this.changeCounter = new HashMap<>();
+ }
+
+ @Override
+ public void onEvent(Event inputEvent, SpOutputCollector out) {
+
+ String value = inputEvent.getFieldBySelector(selectedFieldName).getAsPrimitive().getAsString();
+ String key = this.fieldValueOfLastEvent + ">" + value;
+ boolean updateCounter = false;
+
+ if (!this.fieldValueOfLastEvent.equals(value) && !this.fieldValueOfLastEvent.isEmpty()) {
+ updateCounter = true;
+
+ if (changeCounter.containsKey(key)) {
+ changeCounter.put(key, changeCounter.get(key) + 1);
+ } else {
+ changeCounter.put(key, 1);
+ }
+ }
+
+ if (updateCounter) {
+ inputEvent.addField(StringCounterController.CHANGE_FROM_FIELD_RUNTIME_NAME, this.fieldValueOfLastEvent);
+ inputEvent.addField(StringCounterController.CHANGE_TO_FIELD_RUNTIME_NAME, value);
+ inputEvent.addField(StringCounterController.COUNT_FIELD_RUNTIME_NAME, changeCounter.get(key));
+ out.collect(inputEvent);
+ }
+
+ this.fieldValueOfLastEvent = value;
+ }
+
+ @Override
+ public void onDetach() {
+ }
+
+}
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounterController.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounterController.java
new file mode 100644
index 0000000..290733f
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounterController.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.counter;
+
+import org.apache.streampipes.model.graph.DataProcessorDescription;
+import org.apache.streampipes.model.graph.DataProcessorInvocation;
+import org.apache.streampipes.model.schema.PropertyScope;
+import org.apache.streampipes.sdk.builder.ProcessingElementBuilder;
+import org.apache.streampipes.sdk.builder.StreamRequirementsBuilder;
+import org.apache.streampipes.sdk.extractor.ProcessingElementParameterExtractor;
+import org.apache.streampipes.sdk.helpers.*;
+import org.apache.streampipes.sdk.utils.Assets;
+import org.apache.streampipes.wrapper.standalone.ConfiguredEventProcessor;
+import org.apache.streampipes.wrapper.standalone.declarer.StandaloneEventProcessingDeclarer;
+
+public class StringCounterController extends StandaloneEventProcessingDeclarer<StringCounterParameters> {
+
+ private static final String FIELD_ID = "field";
+ private static final String COUNT_FIELD_ID = "countField";
+ private static final String CHANGE_FROM_FIELD_ID = "changeFromField";
+ private static final String CHANGE_TO_FIELD_ID = "changeToField";
+
+ public static final String COUNT_FIELD_RUNTIME_NAME = "counter";
+ public static final String CHANGE_FROM_FIELD_RUNTIME_NAME = "change_from";
+ public static final String CHANGE_TO_FIELD_RUNTIME_NAME = "change_to";
+
+
+ @Override
+ public DataProcessorDescription declareModel() {
+ return ProcessingElementBuilder.create("org.apache.streampipes.processors.transformation.jvm.stringoperator.counter")
+ .withLocales(Locales.EN)
+ .withAssets(Assets.DOCUMENTATION, Assets.ICON)
+ .requiredStream(StreamRequirementsBuilder.create()
+ .requiredPropertyWithUnaryMapping(
+ EpRequirements.stringReq(),
+ Labels.withId(FIELD_ID),
+ PropertyScope.NONE)
+ .build())
+ .outputStrategy(OutputStrategies.append(
+ EpProperties.stringEp(Labels.withId(CHANGE_FROM_FIELD_ID), CHANGE_FROM_FIELD_RUNTIME_NAME, "http://schema.org/String"),
+ EpProperties.stringEp(Labels.withId(CHANGE_TO_FIELD_ID), CHANGE_TO_FIELD_RUNTIME_NAME, "http://schema.org/String"),
+ EpProperties.numberEp(Labels.withId(COUNT_FIELD_ID), COUNT_FIELD_RUNTIME_NAME, "http://schema.org/Number")
+ ))
+ .build();
+ }
+
+ @Override
+ public ConfiguredEventProcessor<StringCounterParameters> onInvocation(DataProcessorInvocation graph, ProcessingElementParameterExtractor extractor) {
+
+ String selectedFieldName = extractor.mappingPropertyValue(FIELD_ID);
+
+ StringCounterParameters params = new StringCounterParameters(graph, selectedFieldName);
+ return new ConfiguredEventProcessor<>(params, StringCounter::new);
+ }
+}
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounterParameters.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounterParameters.java
new file mode 100644
index 0000000..27c0cef
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/counter/StringCounterParameters.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.counter;
+
+import org.apache.streampipes.model.graph.DataProcessorInvocation;
+import org.apache.streampipes.wrapper.params.binding.EventProcessorBindingParams;
+
+public class StringCounterParameters extends EventProcessorBindingParams {
+ private String selectedFieldName;
+
+ public StringCounterParameters(DataProcessorInvocation graph, String selectedFieldName) {
+ super(graph);
+ this.selectedFieldName = selectedFieldName;
+ }
+
+ public String getSelectedFieldName() {
+ return selectedFieldName;
+ }
+
+}
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimer.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimer.java
new file mode 100644
index 0000000..454284d
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimer.java
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.timer;
+
+import org.apache.streampipes.logging.api.Logger;
+import org.apache.streampipes.model.runtime.Event;
+import org.apache.streampipes.wrapper.context.EventProcessorRuntimeContext;
+import org.apache.streampipes.wrapper.routing.SpOutputCollector;
+import org.apache.streampipes.wrapper.runtime.EventProcessor;
+
+public class StringTimer implements EventProcessor<StringTimerParameters> {
+
+ private static Logger LOG;
+
+ private String selectedFieldName;
+ private Long timestamp;
+ private double outputDivisor;
+ private String fieldValueOfLastEvent;
+
+ @Override
+ public void onInvocation(StringTimerParameters stringTimerParameters,
+ SpOutputCollector spOutputCollector,
+ EventProcessorRuntimeContext runtimeContext) {
+ LOG = stringTimerParameters.getGraph().getLogger(StringTimer.class);
+ this.selectedFieldName = stringTimerParameters.getSelectedFieldName();
+ this.outputDivisor = stringTimerParameters.getOutputDivisor();
+
+ }
+
+ @Override
+ public void onEvent(Event inputEvent, SpOutputCollector out) {
+
+ String value = inputEvent.getFieldBySelector(selectedFieldName).getAsPrimitive().getAsString();
+ Long currentTime = System.currentTimeMillis();
+
+ if (this.fieldValueOfLastEvent == null) {
+ this.timestamp = currentTime;
+ } else {
+ if (!this.fieldValueOfLastEvent.equals(value)) {
+ Long difference = currentTime - this.timestamp;
+ double result = difference / this.outputDivisor;
+
+ inputEvent.addField(StringTimerController.MEASURED_TIME_FIELD_RUNTIME_NAME, result);
+ inputEvent.addField(StringTimerController.FIELD_VALUE_RUNTIME_NAME, this.fieldValueOfLastEvent);
+ out.collect(inputEvent);
+
+ timestamp = currentTime;
+ }
+ }
+ this.fieldValueOfLastEvent = value;
+ }
+
+ @Override
+ public void onDetach() {
+ }
+}
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimerController.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimerController.java
new file mode 100644
index 0000000..f58cfaf
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimerController.java
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.timer;
+
+import org.apache.streampipes.model.graph.DataProcessorDescription;
+import org.apache.streampipes.model.graph.DataProcessorInvocation;
+import org.apache.streampipes.model.schema.PropertyScope;
+import org.apache.streampipes.sdk.builder.ProcessingElementBuilder;
+import org.apache.streampipes.sdk.builder.StreamRequirementsBuilder;
+import org.apache.streampipes.sdk.extractor.ProcessingElementParameterExtractor;
+import org.apache.streampipes.sdk.helpers.*;
+import org.apache.streampipes.sdk.utils.Assets;
+import org.apache.streampipes.wrapper.standalone.ConfiguredEventProcessor;
+import org.apache.streampipes.wrapper.standalone.declarer.StandaloneEventProcessingDeclarer;
+
+public class StringTimerController extends StandaloneEventProcessingDeclarer<StringTimerParameters> {
+
+ public static final String FIELD_ID = "field";
+ public static final String MEASURED_TIME_ID = "measuredTime";
+ public static final String FIELD_VALUE_ID = "fieldValue";
+
+ public static final String OUTPUT_UNIT_ID = "outputUnit";
+ private static final String MILLISECONDS = "Milliseconds";
+ private static final String SECONDS = "Seconds";
+ private static final String MINUTES = "Minutes";
+
+ public static final String MEASURED_TIME_FIELD_RUNTIME_NAME = "measured_time";
+ public static final String FIELD_VALUE_RUNTIME_NAME = "field_value";
+
+
+ @Override
+ public DataProcessorDescription declareModel() {
+ return ProcessingElementBuilder.create("org.apache.streampipes.processors.transformation.jvm.stringoperator.timer")
+ .withLocales(Locales.EN)
+ .withAssets(Assets.DOCUMENTATION, Assets.ICON)
+ .requiredStream(StreamRequirementsBuilder.create()
+ .requiredPropertyWithUnaryMapping(
+ EpRequirements.stringReq(),
+ Labels.withId(FIELD_ID),
+ PropertyScope.NONE)
+ .build())
+ .requiredSingleValueSelection(Labels.withId(OUTPUT_UNIT_ID), Options.from(MILLISECONDS, SECONDS, MINUTES))
+ .outputStrategy(OutputStrategies.append(
+ EpProperties.numberEp(Labels.withId(MEASURED_TIME_ID), MEASURED_TIME_FIELD_RUNTIME_NAME, "http://schema.org/Number"),
+ EpProperties.stringEp(Labels.withId(FIELD_VALUE_ID), FIELD_VALUE_RUNTIME_NAME, "http://schema.org/String")
+ ))
+ .build();
+ }
+
+ @Override
+ public ConfiguredEventProcessor<StringTimerParameters> onInvocation(DataProcessorInvocation graph, ProcessingElementParameterExtractor extractor) {
+
+ String selectedFieldName = extractor.mappingPropertyValue(FIELD_ID);
+ String outputUnit = extractor.selectedSingleValue(OUTPUT_UNIT_ID, String.class);
+
+ double outputDivisor= 1.0;
+ if (outputUnit.equals(SECONDS)) {
+ outputDivisor = 1000.0;
+ } else if (outputUnit.equals(MINUTES)) {
+ outputDivisor = 60000.0;
+ }
+
+ StringTimerParameters params = new StringTimerParameters(graph, selectedFieldName, outputDivisor);
+
+ return new ConfiguredEventProcessor<>(params, StringTimer::new);
+ }
+}
diff --git a/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimerParameters.java b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimerParameters.java
new file mode 100644
index 0000000..5e26dc9
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/java/org/apache/streampipes/processors/transformation/jvm/processor/stringoperator/timer/StringTimerParameters.java
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.apache.streampipes.processors.transformation.jvm.processor.stringoperator.timer;
+
+import org.apache.streampipes.model.graph.DataProcessorInvocation;
+import org.apache.streampipes.wrapper.params.binding.EventProcessorBindingParams;
+
+public class StringTimerParameters extends EventProcessorBindingParams {
+ private String fieldName;
+ private double outputDivisor;
+
+ public StringTimerParameters(DataProcessorInvocation graph, String fieldName, double outputDivisor) {
+ super(graph);
+ this.fieldName = fieldName;
+ this.outputDivisor = outputDivisor;
+ }
+
+ public String getSelectedFieldName() {
+ return fieldName;
+ }
+
+ public double getOutputDivisor() {
+ return outputDivisor;
+ }
+
+}
diff --git a/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/documentation.md b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/documentation.md
new file mode 100644
index 0000000..4996f0e
--- /dev/null
+++ b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/documentation.md
@@ -0,0 +1,55 @@
+<!--
+ ~ Licensed to the Apache Software Foundation (ASF) under one or more
+ ~ contributor license agreements. See the NOTICE file distributed with
+ ~ this work for additional information regarding copyright ownership.
+ ~ The ASF licenses this file to You under the Apache License, Version 2.0
+ ~ (the "License"); you may not use this file except in compliance with
+ ~ the License. You may obtain a copy of the License at
+ ~
+ ~ http://www.apache.org/licenses/LICENSE-2.0
+ ~
+ ~ Unless required by applicable law or agreed to in writing, software
+ ~ distributed under the License is distributed on an "AS IS" BASIS,
+ ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ~ See the License for the specific language governing permissions and
+ ~ limitations under the License.
+ ~
+ -->
+
+## String Counter
+
+<p align="center">
+ <img src="icon.png" width="150px;" class="pe-image-documentation"/>
+</p>
+
+***
+
+## Description
+
+This processor monitors a string field and counts how often the value of the string changes. Hereby, a change is characterized by
+the value of the field before and the value after the change, combined forming a pair. The processor keeps track of the counter for each pair.
+
+***
+
+## Required input
+
+A string field is required in the data stream and can be selected with the field mapping.
+
+### String Field
+
+The string field to be monitored.
+
+***
+
+## Configuration
+
+(no further configuration required)
+
+## Output
+The following three fields are appended to the event:
+* [counter] numerical field with the current count value for the given value pair
+* [change_from] the value of the string before the change
+* [change_to] the value of the string after the change
+
+The event is emitted whenever the value of the string field changes.
+
diff --git a/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/icon.png b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/icon.png
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diff --git a/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/strings.en b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.counter/strings.en
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+org.apache.streampipes.processors.transformation.jvm.stringoperator.counter.title=String Counter
+org.apache.streampipes.processors.transformation.jvm.stringoperator.counter.description= Increases a counter on each change of a string value.
+
+field.title=String Field
+field.description=The field of the string to monitor
+
+countField.title=Counter
+countField.description= Number of changes of the given pair
+
+changeFromField.title = Change From Value
+changeFromField.description= Field value before the change
+
+changeFromField.title = Change To Value
+changeFromField.description= Field value after the change
+
+
diff --git a/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/documentation.md b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/documentation.md
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+++ b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/documentation.md
@@ -0,0 +1,54 @@
+<!--
+ ~ Licensed to the Apache Software Foundation (ASF) under one or more
+ ~ contributor license agreements. See the NOTICE file distributed with
+ ~ this work for additional information regarding copyright ownership.
+ ~ The ASF licenses this file to You under the Apache License, Version 2.0
+ ~ (the "License"); you may not use this file except in compliance with
+ ~ the License. You may obtain a copy of the License at
+ ~
+ ~ http://www.apache.org/licenses/LICENSE-2.0
+ ~
+ ~ Unless required by applicable law or agreed to in writing, software
+ ~ distributed under the License is distributed on an "AS IS" BASIS,
+ ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ~ See the License for the specific language governing permissions and
+ ~ limitations under the License.
+ ~
+ -->
+
+## String Timer
+
+<p align="center">
+ <img src="icon.png" width="150px;" class="pe-image-documentation"/>
+</p>
+
+***
+
+## Description
+
+This processor measures how long a value of a string field does not change. Once the value is changes the event with the measured time and the corresponding string value is emitted.
+
+
+***
+
+## Required input
+
+A string field is required in the data stream.
+
+### Field
+
+The string field which is monitored for any value changes.
+
+***
+
+## Configuration
+
+(no further configuration required)
+
+## Output
+The following two fields are appended to the event:
+* [measured_time] the measured time for the string value to not change
+* [field_value] the corresponding string value
+
+The event is emitted whenever the value of the string field changes.
+
diff --git a/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/icon.png b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/icon.png
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diff --git a/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/strings.en b/streampipes-processors-transformation-jvm/src/main/resources/org.apache.streampipes.processors.transformation.jvm.stringoperator.timer/strings.en
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@@ -0,0 +1,17 @@
+org.apache.streampipes.processors.transformation.jvm.stringoperator.timer.title=String Timer
+org.apache.streampipes.processors.transformation.jvm.stringoperator.timer.description=Measures how long a string value does not change
+
+field.title=String Field
+field.description=The string field that is monitored
+
+measuredTime.title = Measured Time
+measuredTime.description = The time for the va
+
+fieldValue.title = Field Value
+fieldValue.description = The corresponding field value
+
+outputUnit.title= Output Unit
+outputUnit.description = The output unit of the measured time
+
+
+