Make maxParamByteSize configurable in ParamFlowRequestDataWriter of cluster client module and fix bugs (#823)

sentinel-cluster/sentinel-cluster-client-default/src/main/java/com/alibaba/csp/sentinel/cluster/client/codec/data/ParamFlowRequestDataWriter.java

@@ -15,16 +15,17 @@
  */
 package com.alibaba.csp.sentinel.cluster.client.codec.data;
 
-import java.util.Collection;
-
 import com.alibaba.csp.sentinel.cluster.ClusterConstants;
 import com.alibaba.csp.sentinel.cluster.codec.EntityWriter;
 import com.alibaba.csp.sentinel.cluster.request.data.ParamFlowRequestData;
 import com.alibaba.csp.sentinel.log.RecordLog;
 import com.alibaba.csp.sentinel.util.AssertUtil;
-
 import io.netty.buffer.ByteBuf;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
 /**
  * @author jialiang.linjl
  * @author Eric Zhao
@@ -50,16 +51,42 @@ public class ParamFlowRequestDataWriter implements EntityWriter<ParamFlowRequest
 
         Collection<Object> params = entity.getParams();
 
-        // Write parameter amount.
+        params = resolveValidParams(params);
-        int amount = calculateParamAmount(params);
+        target.writeInt(params.size());
-        target.writeInt(amount);
 
         // Serialize parameters with type flag.
-        for (Object param : entity.getParams()) {
+        for (Object param : params) {
             encodeValue(param, target);
         }
     }
 
+    /**
+     * Get valid parameters in provided parameter list
+     *
+     * @param params
+     * @return
+     */
+    public List<Object> resolveValidParams(Collection<Object> params) {
+        List<Object> validParams = new ArrayList<>();
+        int size = 0;
+        for (Object param : params) {
+            int s = calculateParamTransportSize(param);
+            if (s <= 0) {
+                RecordLog.warn("[ParamFlowRequestDataWriter] WARN: Non-primitive type detected in params of "
+                        + "cluster parameter flow control, which is not supported: " + param);
+                continue;
+            }
+            if (size + s > maxParamByteSize) {
+                RecordLog.warn("[ParamFlowRequestDataWriter] WARN: params size is too big." +
+                        " the configure value is : " + maxParamByteSize + ", the params size is: " + params.size());
+                break;
+            }
+            size += s;
+            validParams.add(param);
+        }
+        return validParams;
+    }
+
     private void encodeValue(Object param, ByteBuf target) {
         // Handle primitive type.
         if (param instanceof Integer || int.class.isInstance(param)) {
@@ -97,30 +124,6 @@ public class ParamFlowRequestDataWriter implements EntityWriter<ParamFlowRequest
         target.writeBytes(tmpChars);
     }
 
-    /**
-     * Calculate amount of valid parameters in provided parameter list.
-     *
-     * @param params non-empty parameter list
-     * @return amount of valid parameters
-     */
-    int calculateParamAmount(/*@NonEmpty*/ Collection<Object> params) {
-        int size = 0;
-        int length = 0;
-        for (Object param : params) {
-            int s = calculateParamTransportSize(param);
-            if (s <= 0) {
-                RecordLog.warn("[ParamFlowRequestDataWriter] WARN: Non-primitive type detected in params of "
-                    + "cluster parameter flow control, which is not supported: " + param);
-                continue;
-            }
-            if (size + s > maxParamByteSize) {
-                break;
-            }
-            size += s;
-            length++;
-        }
-        return length;
-    }
 
     int calculateParamTransportSize(Object value) {
         if (value == null) {

sentinel-cluster/sentinel-cluster-client-default/src/main/java/com/alibaba/csp/sentinel/cluster/client/config/ClusterClientStartUpConfig.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.csp.sentinel.cluster.client.config;
+
+import com.alibaba.csp.sentinel.config.SentinelConfig;
+import com.alibaba.csp.sentinel.log.RecordLog;
+
+/**
+ * <p>
+ * this class dedicated to reading startup configurations of cluster client
+ * </p>
+ *
+ * @author lianglin
+ * @since 1.7.0
+ */
+public class ClusterClientStartUpConfig {
+
+    private static final String MAX_PARAM_BYTE_SIZE = "csp.sentinel.cluster.max.param.byte.size";
+
+    /**
+     * Get the max bytes params can be serialized
+     *
+     * @return the max bytes, may be null
+     */
+    public static Integer getMaxParamByteSize() {
+        String maxParamByteSize = SentinelConfig.getConfig(MAX_PARAM_BYTE_SIZE);
+        try {
+            return maxParamByteSize == null ? null : Integer.valueOf(maxParamByteSize);
+        } catch (Exception ex) {
+            RecordLog.warn("[ClusterClientStartUpConfig] Failed to parse maxParamByteSize: " + maxParamByteSize);
+            return null;
+        }
+    }
+
+
+}

sentinel-cluster/sentinel-cluster-client-default/src/main/java/com/alibaba/csp/sentinel/cluster/client/init/DefaultClusterClientInitFunc.java

@@ -23,6 +23,7 @@ import com.alibaba.csp.sentinel.cluster.client.codec.data.PingRequestDataWriter;
 import com.alibaba.csp.sentinel.cluster.client.codec.data.PingResponseDataDecoder;
 import com.alibaba.csp.sentinel.cluster.client.codec.registry.RequestDataWriterRegistry;
 import com.alibaba.csp.sentinel.cluster.client.codec.registry.ResponseDataDecodeRegistry;
+import com.alibaba.csp.sentinel.cluster.client.config.ClusterClientStartUpConfig;
 import com.alibaba.csp.sentinel.init.InitFunc;
 import com.alibaba.csp.sentinel.init.InitOrder;
 
@@ -42,7 +43,12 @@ public class DefaultClusterClientInitFunc implements InitFunc {
     private void initDefaultEntityWriters() {
         RequestDataWriterRegistry.addWriter(ClientConstants.TYPE_PING, new PingRequestDataWriter());
         RequestDataWriterRegistry.addWriter(ClientConstants.TYPE_FLOW, new FlowRequestDataWriter());
+        Integer maxParamByteSize = ClusterClientStartUpConfig.getMaxParamByteSize();
+        if (maxParamByteSize == null) {
             RequestDataWriterRegistry.addWriter(ClientConstants.TYPE_PARAM_FLOW, new ParamFlowRequestDataWriter());
+        } else {
+            RequestDataWriterRegistry.addWriter(ClientConstants.TYPE_PARAM_FLOW, new ParamFlowRequestDataWriter(maxParamByteSize));
+        }
     }
 
     private void initDefaultEntityDecoders() {

sentinel-cluster/sentinel-cluster-client-default/src/test/java/com/alibaba/csp/sentinel/cluster/client/codec/data/ParamFlowRequestDataWriterTest.java

@@ -1,9 +1,10 @@
 package com.alibaba.csp.sentinel.cluster.client.codec.data;
 
-import java.util.ArrayList;
-
 import org.junit.Test;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import static org.junit.Assert.*;
 
 /**
@@ -27,34 +28,32 @@ public class ParamFlowRequestDataWriterTest {
     }
 
     @Test
-    public void testCalculateParamAmountExceedsMaxSize() {
+    public void testResolveValidParams() {
-        final int maxSize = 10;
+
+        final int maxSize = 15;
         ParamFlowRequestDataWriter writer = new ParamFlowRequestDataWriter(maxSize);
-        assertEquals(1, writer.calculateParamAmount(new ArrayList<Object>() {{
+
+        ArrayList<Object> params = new ArrayList<Object>() {{
             add(1);
-        }}));
+            add(64);
-        assertEquals(2, writer.calculateParamAmount(new ArrayList<Object>() {{
+            add(3);
-            add(1); add(64);
+        }};
-        }}));
+
-        assertEquals(2, writer.calculateParamAmount(new ArrayList<Object>() {{
+        List<Object> validParams = writer.resolveValidParams(params);
-            add(1); add(64); add(3);
+        assertTrue(validParams.contains(1) && validParams.contains(64) && validParams.contains(3));
-        }}));
+
+        //when over maxSize, the exceed number should not be contained
+        params.add(5);
+        assertFalse(writer.resolveValidParams(params).contains(5));
+
+
+        //POJO (non-primitive type) should not be regarded as a valid parameter
+        assertTrue(writer.resolveValidParams(new ArrayList<Object>() {{
+            add(new SomePojo());
+        }}).size() == 0);
+
     }
 
-    @Test
-    public void testCalculateParamAmount() {
-        ParamFlowRequestDataWriter writer = new ParamFlowRequestDataWriter();
-        assertEquals(6, writer.calculateParamAmount(new ArrayList<Object>() {{
-            add(1); add(1d); add(1f); add((byte) 1); add("123"); add(true);
-        }}));
-        // POJO (non-primitive type) should not be regarded as a valid parameter.
-        assertEquals(0, writer.calculateParamAmount(new ArrayList<Object>() {{
-            add(new SomePojo());
-        }}));
-        assertEquals(1, writer.calculateParamAmount(new ArrayList<Object>() {{
-            add(new Object()); add(1);
-        }}));
-    }
 
     private static class SomePojo {
         private String param1;

sentinel-core/src/main/java/com/alibaba/csp/sentinel/config/SentinelConfig.java

@@ -15,6 +15,11 @@
  */
 package com.alibaba.csp.sentinel.config;
 
+import com.alibaba.csp.sentinel.log.LogBase;
+import com.alibaba.csp.sentinel.log.RecordLog;
+import com.alibaba.csp.sentinel.util.AppNameUtil;
+import com.alibaba.csp.sentinel.util.AssertUtil;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.util.Map;
@@ -22,11 +27,6 @@ import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArraySet;
 
-import com.alibaba.csp.sentinel.log.LogBase;
-import com.alibaba.csp.sentinel.log.RecordLog;
-import com.alibaba.csp.sentinel.util.AppNameUtil;
-import com.alibaba.csp.sentinel.util.AssertUtil;
-
 /**
  * The universal local config center of Sentinel. The config is retrieved from command line arguments
  * and {@code ${user.home}/logs/csp/${appName}.properties} file by default.
@@ -53,6 +53,7 @@ public class SentinelConfig {
     public static final String COLD_FACTOR = "csp.sentinel.flow.cold.factor";
     public static final String STATISTIC_MAX_RT = "csp.sentinel.statistic.max.rt";
 
+
     static final String DEFAULT_CHARSET = "UTF-8";
     static final long DEFAULT_SINGLE_METRIC_FILE_SIZE = 1024 * 1024 * 50;
     static final int DEFAULT_TOTAL_METRIC_FILE_COUNT = 6;