sijie closed pull request #3257: Improve service url and service url provider 
prompt.
URL: https://github.com/apache/pulsar/pull/3257
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
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diff --git 
a/pulsar-client/src/main/java/org/apache/pulsar/client/impl/ClientBuilderImpl.java
 
b/pulsar-client/src/main/java/org/apache/pulsar/client/impl/ClientBuilderImpl.java
index d5545cee3d..5e00a30226 100644
--- 
a/pulsar-client/src/main/java/org/apache/pulsar/client/impl/ClientBuilderImpl.java
+++ 
b/pulsar-client/src/main/java/org/apache/pulsar/client/impl/ClientBuilderImpl.java
@@ -45,11 +45,18 @@ public ClientBuilderImpl(ClientConfigurationData conf) {
 
     @Override
     public PulsarClient build() throws PulsarClientException {
-        if (conf.getServiceUrlProvider() != null && 
StringUtils.isNotBlank(conf.getServiceUrlProvider().getServiceUrl())) {
-            conf.setServiceUrl(conf.getServiceUrlProvider().getServiceUrl());
+        if (StringUtils.isBlank(conf.getServiceUrl()) && 
conf.getServiceUrlProvider() == null) {
+            throw new IllegalArgumentException("service URL or service URL 
provider needs to be specified on the ClientBuilder object.");
         }
-        if (conf.getServiceUrl() == null) {
-            throw new IllegalArgumentException("service URL or service URL 
provider needs to be specified on the ClientBuilder object");
+        if (StringUtils.isNotBlank(conf.getServiceUrl()) && 
conf.getServiceUrlProvider() != null) {
+            throw new IllegalArgumentException("Can only chose one way service 
URL or service URL provider.");
+        }
+        if (conf.getServiceUrlProvider() != null) {
+            if 
(StringUtils.isBlank(conf.getServiceUrlProvider().getServiceUrl())) {
+                throw new IllegalArgumentException("Cannot get service url 
from service url provider.");
+            } else {
+                
conf.setServiceUrl(conf.getServiceUrlProvider().getServiceUrl());
+            }
         }
         PulsarClient client = new PulsarClientImpl(conf);
         if (conf.getServiceUrlProvider() != null) {
@@ -72,6 +79,9 @@ public ClientBuilder loadConf(Map<String, Object> config) {
 
     @Override
     public ClientBuilder serviceUrl(String serviceUrl) {
+        if (StringUtils.isBlank(serviceUrl)) {
+            throw new IllegalArgumentException("Param serviceUrl must not be 
blank.");
+        }
         conf.setServiceUrl(serviceUrl);
         if (!conf.isUseTls()) {
             enableTls(serviceUrl.startsWith("pulsar+ssl") || 
serviceUrl.startsWith("https"));
@@ -81,6 +91,9 @@ public ClientBuilder serviceUrl(String serviceUrl) {
 
     @Override
     public ClientBuilder serviceUrlProvider(ServiceUrlProvider 
serviceUrlProvider) {
+        if (serviceUrlProvider == null) {
+            throw new IllegalArgumentException("Param serviceUrlProvider must 
not be null.");
+        }
         conf.setServiceUrlProvider(serviceUrlProvider);
         return this;
     }
diff --git 
a/pulsar-client/src/test/java/org/apache/pulsar/client/impl/ClientBuilderImplTest.java
 
b/pulsar-client/src/test/java/org/apache/pulsar/client/impl/ClientBuilderImplTest.java
new file mode 100644
index 0000000000..8cf9b59de1
--- /dev/null
+++ 
b/pulsar-client/src/test/java/org/apache/pulsar/client/impl/ClientBuilderImplTest.java
@@ -0,0 +1,73 @@
+/**
+ * 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.pulsar.client.impl;
+
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.PulsarClientException;
+import org.apache.pulsar.client.api.ServiceUrlProvider;
+import org.testng.annotations.Test;
+
+public class ClientBuilderImplTest {
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testClientBuilderWithServiceUrlAndServiceUrlProviderNotSet() 
throws PulsarClientException {
+        PulsarClient.builder().build();
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testClientBuilderWithNullServiceUrl() throws 
PulsarClientException {
+        PulsarClient.builder().serviceUrl(null).build();
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testClientBuilderWithNullServiceUrlProvider() throws 
PulsarClientException {
+        PulsarClient.builder().serviceUrlProvider(null).build();
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testClientBuilderWithServiceUrlAndServiceUrlProvider() throws 
PulsarClientException {
+        PulsarClient.builder().serviceUrlProvider(new ServiceUrlProvider() {
+            @Override
+            public void initialize(PulsarClient client) {
+
+            }
+
+            @Override
+            public String getServiceUrl() {
+                return "pulsar://localhost:6650";
+            }
+        }).serviceUrl("pulsar://localhost:6650").build();
+    }
+
+    @Test(expectedExceptions = IllegalArgumentException.class)
+    public void testClientBuilderWithBlankServiceUrlInServiceUrlProvider() 
throws PulsarClientException {
+        PulsarClient.builder().serviceUrlProvider(new ServiceUrlProvider() {
+            @Override
+            public void initialize(PulsarClient client) {
+
+            }
+
+            @Override
+            public String getServiceUrl() {
+                return "";
+            }
+        }).build();
+    }
+
+}


 

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