Add minimal concrete implementations of abstract metrics

hystrix-core/src/main/java/com/netflix/hystrix/strategy/metrics/noop/HystrixCollapserMetricsNoOp.java

@@ -0,0 +1,91 @@
+/**
+ * Copyright 2015 Netflix, Inc.
+ * 
+ * Licensed 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 com.netflix.hystrix.strategy.metrics.noop;
+
+import com.netflix.hystrix.HystrixCollapserKey;
+import com.netflix.hystrix.HystrixCollapserMetrics;
+import com.netflix.hystrix.HystrixCollapserProperties;
+import com.netflix.hystrix.util.HystrixRollingNumberEvent;
+
+/**
+ * Not needed for health check - so it's fine to just drop all collapser metrics on the floor if you're not interested in them
+ */
+public class HystrixCollapserMetricsNoOp extends HystrixCollapserMetrics {
+
+    HystrixCollapserMetricsNoOp(HystrixCollapserKey key, HystrixCollapserProperties properties) {
+        super(key, properties);
+    }
+
+    @Override
+    public int getBatchSizePercentile(double percentile) {
+        return 0;
+    }
+
+    @Override
+    public int getBatchSizeMean() {
+        return 0;
+    }
+
+    @Override
+    protected void addBatchSize(int batchSize) {
+
+    }
+
+    @Override
+    public int getShardSizePercentile(double percentile) {
+        return 0;
+    }
+
+    @Override
+    public int getShardSizeMean() {
+        return 0;
+    }
+
+    @Override
+    protected void addShardSize(int shardSize) {
+
+    }
+
+    @Override
+    public long getCumulativeCount(HystrixRollingNumberEvent event) {
+        return 0;
+    }
+
+    @Override
+    public long getRollingCount(HystrixRollingNumberEvent event) {
+        return 0;
+    }
+
+    @Override
+    public long getRollingMax(HystrixRollingNumberEvent event) {
+        return 0;
+    }
+
+    @Override
+    protected void addEvent(HystrixRollingNumberEvent event) {
+
+    }
+
+    @Override
+    protected void addEventWithValue(HystrixRollingNumberEvent event, long value) {
+
+    }
+
+    @Override
+    protected void updateRollingMax(HystrixRollingNumberEvent event, long value) {
+
+    }
+}

hystrix-core/src/main/java/com/netflix/hystrix/strategy/metrics/noop/HystrixCommandMetricsCountsOnly.java

@@ -0,0 +1,112 @@
+/**
+ * Copyright 2015 Netflix, Inc.
+ * 
+ * Licensed 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 com.netflix.hystrix.strategy.metrics.noop;
+
+import com.netflix.hystrix.HystrixCommandGroupKey;
+import com.netflix.hystrix.HystrixCommandKey;
+import com.netflix.hystrix.HystrixCommandMetrics;
+import com.netflix.hystrix.HystrixCommandProperties;
+import com.netflix.hystrix.HystrixThreadPoolKey;
+import com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier;
+import com.netflix.hystrix.util.HystrixRollingNumber;
+import com.netflix.hystrix.util.HystrixRollingNumberEvent;
+
+/**
+ * We need to track counts accurately to properly calculate circuit health.  We can ignore latency, though
+ */
+public class HystrixCommandMetricsCountsOnly extends HystrixCommandMetrics {
+
+    private final HystrixRollingNumber counter;
+
+    public HystrixCommandMetricsCountsOnly(HystrixCommandKey key, HystrixCommandGroupKey commandGroup, HystrixThreadPoolKey threadPoolKey, HystrixCommandProperties properties, HystrixEventNotifier eventNotifier) {
+        super(key, commandGroup, threadPoolKey, properties, eventNotifier);
+        this.counter = new HystrixRollingNumber(properties.metricsRollingStatisticalWindowInMilliseconds().get(), properties.metricsRollingStatisticalWindowBuckets().get());
+    }
+
+    /**
+     * COUNT measurements that must be implemented
+     */
+
+
+    @Override
+    public long getCumulativeCount(HystrixRollingNumberEvent event) {
+        return counter.getCumulativeSum(event);
+    }
+
+    @Override
+    public long getRollingCount(HystrixRollingNumberEvent event) {
+        return counter.getRollingSum(event);
+    }
+
+    @Override
+    public long getRollingMax(HystrixRollingNumberEvent event) {
+        return counter.getRollingMaxValue(event);
+    }
+
+    @Override
+    protected void addEvent(HystrixRollingNumberEvent event) {
+        counter.increment(event);
+    }
+
+    @Override
+    protected void addEventWithValue(HystrixRollingNumberEvent event, long value) {
+        counter.add(event, value);
+    }
+
+    @Override
+    protected void updateRollingMax(HystrixRollingNumberEvent event, long value) {
+        counter.updateRollingMax(event, value);
+    }
+
+    @Override
+    protected void clear() {
+        counter.reset();
+    }
+
+    /**
+     * LATENCY measurements that may be ignored
+     */
+
+    @Override
+    public int getExecutionTimePercentile(double percentile) {
+        return 0;
+    }
+
+    @Override
+    public int getExecutionTimeMean() {
+        return 0;
+    }
+
+    @Override
+    public int getTotalTimePercentile(double percentile) {
+        return 0;
+    }
+
+    @Override
+    public int getTotalTimeMean() {
+        return 0;
+    }
+
+    @Override
+    protected void addCommandExecutionTime(long duration) {
+
+    }
+
+    @Override
+    protected void addUserThreadExecutionTime(long duration) {
+
+    }
+}

hystrix-core/src/main/java/com/netflix/hystrix/strategy/metrics/noop/HystrixMetricsCollectionMinimal.java

@@ -0,0 +1,49 @@
+/**
+ * Copyright 2015 Netflix, Inc.
+ *
+ * Licensed 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 com.netflix.hystrix.strategy.metrics.noop;
+
+import com.netflix.hystrix.HystrixCollapserKey;
+import com.netflix.hystrix.HystrixCollapserMetrics;
+import com.netflix.hystrix.HystrixCollapserProperties;
+import com.netflix.hystrix.HystrixCommandGroupKey;
+import com.netflix.hystrix.HystrixCommandKey;
+import com.netflix.hystrix.HystrixCommandMetrics;
+import com.netflix.hystrix.HystrixCommandProperties;
+import com.netflix.hystrix.HystrixThreadPoolKey;
+import com.netflix.hystrix.HystrixThreadPoolMetrics;
+import com.netflix.hystrix.HystrixThreadPoolProperties;
+import com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier;
+import com.netflix.hystrix.strategy.metrics.HystrixMetricsCollection;
+
+import java.util.concurrent.ThreadPoolExecutor;
+
+public class HystrixMetricsCollectionMinimal extends HystrixMetricsCollection {
+
+    @Override
+    public HystrixCommandMetrics getCommandMetricsInstance(HystrixCommandKey key, HystrixCommandGroupKey commandGroup, HystrixThreadPoolKey threadPoolKey, HystrixCommandProperties properties, HystrixEventNotifier eventNotifier) {
+        return new HystrixCommandMetricsCountsOnly(key, commandGroup, threadPoolKey, properties, eventNotifier);
+    }
+
+    @Override
+    public HystrixThreadPoolMetrics getThreadPoolMetricsInstance(HystrixThreadPoolKey key, ThreadPoolExecutor threadPool, HystrixThreadPoolProperties properties) {
+        return new HystrixThreadPoolMetricsNoOp(key, threadPool, properties);
+    }
+
+    @Override
+    public HystrixCollapserMetrics getCollapserMetricsInstance(HystrixCollapserKey key, HystrixCollapserProperties properties) {
+        return new HystrixCollapserMetricsNoOp(key, properties);
+    }
+}

hystrix-core/src/main/java/com/netflix/hystrix/strategy/metrics/noop/HystrixThreadPoolMetricsNoOp.java

@@ -0,0 +1,63 @@
+/**
+ * Copyright 2015 Netflix, Inc.
+ * 
+ * Licensed 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 com.netflix.hystrix.strategy.metrics.noop;
+
+import com.netflix.hystrix.HystrixThreadPoolKey;
+import com.netflix.hystrix.HystrixThreadPoolMetrics;
+import com.netflix.hystrix.HystrixThreadPoolProperties;
+import com.netflix.hystrix.util.HystrixRollingNumberEvent;
+
+import java.util.concurrent.ThreadPoolExecutor;
+
+/**
+ * Thread pool metrics not used in health checks, so these may be dropped on the floor if you're not interested in them
+ */
+public class HystrixThreadPoolMetricsNoOp extends HystrixThreadPoolMetrics {
+
+    public HystrixThreadPoolMetricsNoOp(HystrixThreadPoolKey key, ThreadPoolExecutor threadPool, HystrixThreadPoolProperties properties) {
+        super(key, threadPool, properties);
+    }
+
+    @Override
+    public long getCumulativeCount(HystrixRollingNumberEvent event) {
+        return 0;
+    }
+
+    @Override
+    public long getRollingCount(HystrixRollingNumberEvent event) {
+        return 0;
+    }
+
+    @Override
+    public long getRollingMax(HystrixRollingNumberEvent event) {
+        return 0;
+    }
+
+    @Override
+    protected void addEvent(HystrixRollingNumberEvent event) {
+
+    }
+
+    @Override
+    protected void addEventWithValue(HystrixRollingNumberEvent event, long value) {
+
+    }
+
+    @Override
+    protected void updateRollingMax(HystrixRollingNumberEvent event, long value) {
+
+    }
+}