Support for SendGrid ApiKey

See gh-4574

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/sendgrid/SendGridAutoConfiguration.java

@@ -22,11 +22,13 @@ import org.apache.http.impl.client.HttpClientBuilder;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 
 /**
@@ -37,7 +39,7 @@ import org.springframework.context.annotation.Configuration;
  */
 @Configuration
 @ConditionalOnClass(SendGrid.class)
-@ConditionalOnProperty(prefix = "spring.sendgrid", value = "username")
+@Conditional(SendGridAutoConfiguration.SendGridPropertyCondition.class)
 @EnableConfigurationProperties(SendGridProperties.class)
 public class SendGridAutoConfiguration {
 
@@ -47,15 +49,39 @@ public class SendGridAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean(SendGrid.class)
 	public SendGrid sendGrid() {
-		SendGrid sendGrid = new SendGrid(this.properties.getUsername(),
-				this.properties.getPassword());
+
+		SendGrid sendGrid;
+
+		if (this.properties.getApikey() != null) {
+			sendGrid = new SendGrid(this.properties.getApikey());
+		}
+		else {
+			sendGrid = new SendGrid(this.properties.getUsername(),
+					this.properties.getPassword());
+		}
+
 		if (this.properties.isProxyConfigured()) {
 			HttpHost proxy = new HttpHost(this.properties.getProxy().getHost(),
 					this.properties.getProxy().getPort());
 			sendGrid.setClient(HttpClientBuilder.create().setProxy(proxy)
 					.setUserAgent("sendgrid/" + sendGrid.getVersion() + ";java").build());
 		}
+
 		return sendGrid;
 	}
 
+	static class SendGridPropertyCondition extends AnyNestedCondition {
+
+		SendGridPropertyCondition() {
+			super(ConfigurationPhase.PARSE_CONFIGURATION);
+		}
+
+		@ConditionalOnProperty(prefix = "spring.sendgrid", value = "username")
+		private class SendGridUserProperty {
+		}
+
+		@ConditionalOnProperty(prefix = "spring.sendgrid", value = "apikey")
+		private class SendGridApiKeyProperty {
+		}
+	}
 }

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/sendgrid/SendGridProperties.java

@@ -37,11 +37,24 @@ public class SendGridProperties {
 	 */
 	private String password;
 
+	/**
+	 * SendGrid api key.
+	 */
+	private String apikey;
+
 	/**
 	 * Proxy configuration.
 	 */
 	private Proxy proxy;
 
+	public String getApikey() {
+		return this.apikey;
+	}
+
+	public void setApikey(final String apikey) {
+		this.apikey = apikey;
+	}
+
 	public String getUsername() {
 		return this.username;
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/sendgrid/SendGridAutoConfigurationTests.java

@@ -58,6 +58,17 @@ public class SendGridAutoConfigurationTests {
 		assertEquals("secret", ReflectionTestUtils.getField(sendGrid, "password"));
 	}
 
+	@Test
+	public void expectedSendGridBeanCreated_UsingApiKey() {
+
+		loadContext("spring.sendgrid.apikey:SG.SECRET-API-KEY");
+
+		SendGrid sendGrid = this.context.getBean(SendGrid.class);
+
+		assertEquals("SG.SECRET-API-KEY",
+				ReflectionTestUtils.getField(sendGrid, "password"));
+	}
+
 	@Test(expected = NoSuchBeanDefinitionException.class)
 	public void autoConfigurationNotFiredWhenPropertiesNotSet() {
 		loadContext();