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acosentino pushed a commit to branch master
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commit e95fec66478bee779705ed3c1e23a2b12bfd0f04
Author: Andrea Cosentino <[email protected]>
AuthorDate: Wed May 9 16:04:04 2018 +0200

    CAMEL-12501 - Camel-Paho: add component verifier from Syndesis project
---
 .../apache/camel/component/paho/PahoComponent.java | 15 ++--
 .../paho/PahoComponentVerifierExtension.java       | 97 ++++++++++++++++++++++
 .../paho/PahoComponentVerifierExtensionTest.java   | 65 +++++++++++++++
 3 files changed, 172 insertions(+), 5 deletions(-)

diff --git 
a/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponent.java
 
b/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponent.java
index 47cb4fe..f61d00f 100644
--- 
a/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponent.java
+++ 
b/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponent.java
@@ -18,15 +18,16 @@ package org.apache.camel.component.paho;
 
 import java.util.Map;
 
+import org.apache.camel.CamelContext;
 import org.apache.camel.Endpoint;
-import org.apache.camel.impl.UriEndpointComponent;
+import org.apache.camel.impl.DefaultComponent;
 import org.apache.camel.spi.Metadata;
 import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
 
 /**
  * Component to integrate with the Eclispe Paho MQTT library.
  */
-public class PahoComponent extends UriEndpointComponent {
+public class PahoComponent extends DefaultComponent {
 
     private String brokerUrl;
     private String clientId;
@@ -34,10 +35,14 @@ public class PahoComponent extends UriEndpointComponent {
     private MqttConnectOptions connectOptions;
     
     public PahoComponent() {
-        super(PahoEndpoint.class);
+        this(null);
+    }
+    
+    public PahoComponent(CamelContext context) {
+        super(context);
+        
+        registerExtension(new PahoComponentVerifierExtension());
     }
-
-    // Overridden
 
     @Override
     protected Endpoint createEndpoint(String uri, String remaining, 
Map<String, Object> parameters) throws Exception {
diff --git 
a/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponentVerifierExtension.java
 
b/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponentVerifierExtension.java
new file mode 100644
index 0000000..c58ee9b
--- /dev/null
+++ 
b/components/camel-paho/src/main/java/org/apache/camel/component/paho/PahoComponentVerifierExtension.java
@@ -0,0 +1,97 @@
+/**
+ * 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.camel.component.paho;
+
+import java.util.Map;
+
+import 
org.apache.camel.component.extension.verifier.DefaultComponentVerifierExtension;
+import org.apache.camel.component.extension.verifier.ResultBuilder;
+import org.apache.camel.component.extension.verifier.ResultErrorBuilder;
+import org.apache.camel.component.extension.verifier.ResultErrorHelper;
+import org.apache.camel.util.ObjectHelper;
+import org.eclipse.paho.client.mqttv3.MqttClient;
+import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
+import org.eclipse.paho.client.mqttv3.MqttException;
+
+public class PahoComponentVerifierExtension extends 
DefaultComponentVerifierExtension {
+
+    public PahoComponentVerifierExtension() {
+        this("paho");
+    }
+
+    public PahoComponentVerifierExtension(String scheme) {
+        super(scheme);
+    }
+
+    // *********************************
+    // Parameters validation
+    // *********************************
+
+    @Override
+    protected Result verifyParameters(Map<String, Object> parameters) {
+        return ResultBuilder.withStatusAndScope(Result.Status.OK, 
Scope.PARAMETERS)
+            .error(ResultErrorHelper.requiresOption("brokerUrl", parameters))
+            .build();
+    }
+
+    // *********************************
+    // Connectivity validation
+    // *********************************
+
+    @Override
+    protected Result verifyConnectivity(Map<String, Object> parameters) {
+        return ResultBuilder.withStatusAndScope(Result.Status.OK, 
Scope.CONNECTIVITY)
+            .error(parameters, this::verifyCredentials)
+            .build();
+    }
+
+    private void verifyCredentials(ResultBuilder builder, Map<String, Object> 
parameters) {
+        String brokerUrl = (String) parameters.get("brokerUrl");
+        String username = (String) parameters.get("userName");
+        String password = (String) parameters.get("password");
+
+        if (ObjectHelper.isNotEmpty(brokerUrl)) {
+            try {
+                // Create MQTT client
+               if (ObjectHelper.isEmpty(username) && 
ObjectHelper.isEmpty(password)) {
+                    MqttClient client = new MqttClient(brokerUrl, 
MqttClient.generateClientId());
+                    client.connect();
+                    client.disconnect();
+                } else {
+                    MqttClient client = new MqttClient(brokerUrl, 
MqttClient.generateClientId());
+                    MqttConnectOptions connOpts = new MqttConnectOptions();
+                    connOpts.setUserName(username);
+                    connOpts.setPassword(password.toCharArray());
+                    client.connect(connOpts);
+                    client.disconnect();
+               }
+            } catch (MqttException e) {
+                builder.error(
+                    
ResultErrorBuilder.withCodeAndDescription(VerificationError.StandardCode.ILLEGAL_PARAMETER_VALUE,
 "Unable to connect to MQTT broker")
+                        .parameterKey("brokerUrl")
+                        .build()
+                );
+            }
+        } else {
+            builder.error(
+                
ResultErrorBuilder.withCodeAndDescription(VerificationError.StandardCode.ILLEGAL_PARAMETER_VALUE,
 "Invalid blank MQTT brokerUrl ")
+                    .parameterKey("brokerUrl")
+                    .build()
+            );
+        }
+    }
+}
diff --git 
a/components/camel-paho/src/test/java/org/apache/camel/component/paho/PahoComponentVerifierExtensionTest.java
 
b/components/camel-paho/src/test/java/org/apache/camel/component/paho/PahoComponentVerifierExtensionTest.java
new file mode 100644
index 0000000..a41b6b0
--- /dev/null
+++ 
b/components/camel-paho/src/test/java/org/apache/camel/component/paho/PahoComponentVerifierExtensionTest.java
@@ -0,0 +1,65 @@
+/**
+ * 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.camel.component.paho;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.camel.Component;
+import org.apache.camel.component.extension.ComponentVerifierExtension;
+import org.apache.camel.test.junit4.CamelTestSupport;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class PahoComponentVerifierExtensionTest extends CamelTestSupport {
+
+    // *************************************************
+    // Tests (parameters)
+    // *************************************************
+    @Override
+    public boolean isUseRouteBuilder() {
+        return false;
+    }
+
+    @Test
+    public void testParameters() throws Exception {
+        Component component = context().getComponent("paho");
+
+        ComponentVerifierExtension verifier = 
component.getExtension(ComponentVerifierExtension.class).orElseThrow(IllegalStateException::new);
+
+        Map<String, Object> parameters = new HashMap<>();
+        parameters.put("brokerUrl", "l");
+
+        ComponentVerifierExtension.Result result = 
verifier.verify(ComponentVerifierExtension.Scope.PARAMETERS, parameters);
+
+        Assert.assertEquals(ComponentVerifierExtension.Result.Status.OK, 
result.getStatus());
+    }
+
+    @Test
+    public void testConnectivity() throws Exception {
+        Component component = context().getComponent("paho");
+        ComponentVerifierExtension verifier = 
component.getExtension(ComponentVerifierExtension.class).orElseThrow(IllegalStateException::new);
+
+        Map<String, Object> parameters = new HashMap<>();
+        parameters.put("brokerUrl", "l");
+
+        ComponentVerifierExtension.Result result = 
verifier.verify(ComponentVerifierExtension.Scope.CONNECTIVITY, parameters);
+
+        Assert.assertEquals(ComponentVerifierExtension.Result.Status.ERROR, 
result.getStatus());
+    }
+
+}

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