Add Liquibase labels and parameters properties

Update `LiquibaseAutoConfiguration` and `LiquibaseProperties` to add
support for labels and parameters.

Closes gh-3915

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/liquibase/LiquibaseAutoConfiguration.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -100,6 +100,8 @@ public class LiquibaseAutoConfiguration {
 			liquibase.setDefaultSchema(this.properties.getDefaultSchema());
 			liquibase.setDropFirst(this.properties.isDropFirst());
 			liquibase.setShouldRun(this.properties.isEnabled());
+			liquibase.setLabels(this.properties.getLabels());
+			liquibase.setChangeLogParameters(this.properties.getParameters());
 			return liquibase;
 		}
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/liquibase/LiquibaseProperties.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.boot.autoconfigure.liquibase;
 
+import java.util.Map;
+
 import javax.validation.constraints.NotNull;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
@@ -78,6 +80,16 @@ public class LiquibaseProperties {
 	 */
 	private String url;
 
+	/**
+	 * Comma-separated list of runtime labels to use.
+	 */
+	private String labels;
+
+	/**
+	 * Change log parameters.
+	 */
+	private Map<String, String> parameters;
+
 	public String getChangeLog() {
 		return this.changeLog;
 	}
@@ -150,4 +162,20 @@ public class LiquibaseProperties {
 		this.url = url;
 	}
 
+	public String getLabels() {
+		return this.labels;
+	}
+
+	public void setLabels(String labels) {
+		this.labels = labels;
+	}
+
+	public Map<String, String> getParameters() {
+		return this.parameters;
+	}
+
+	public void setParameters(Map<String, String> parameters) {
+		this.parameters = parameters;
+	}
+
 }

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/liquibase/LiquibaseAutoConfigurationTests.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.boot.autoconfigure.liquibase;
 
+import java.util.Map;
+
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
@@ -167,4 +169,31 @@ public class LiquibaseAutoConfigurationTests {
 		assertThat(log, instanceOf(CommonsLoggingLiquibaseLogger.class));
 	}
 
+	@Test
+	public void testOverrideLabels() throws Exception {
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"liquibase.labels:test, production");
+		this.context.register(EmbeddedDataSourceConfiguration.class,
+				LiquibaseAutoConfiguration.class,
+				PropertyPlaceholderAutoConfiguration.class);
+		this.context.refresh();
+		SpringLiquibase liquibase = this.context.getBean(SpringLiquibase.class);
+		assertEquals("test, production", liquibase.getLabels());
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	public void testOverrideParameters() throws Exception {
+		EnvironmentTestUtils.addEnvironment(this.context, "liquibase.parameters.foo:bar");
+		this.context.register(EmbeddedDataSourceConfiguration.class,
+				LiquibaseAutoConfiguration.class,
+				PropertyPlaceholderAutoConfiguration.class);
+		this.context.refresh();
+		SpringLiquibase liquibase = this.context.getBean(SpringLiquibase.class);
+		Map<String, String> parameters = (Map<String, String>) ReflectionTestUtils
+				.getField(liquibase, "parameters");
+		assertTrue(parameters.containsKey("foo"));
+		assertEquals("bar", parameters.get("foo"));
+	}
+
 }

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -472,12 +472,14 @@ content into your application; rather pick only the properties that you need.
 	liquibase.change-log=classpath:/db/changelog/db.changelog-master.yaml
 	liquibase.check-change-log-location=true # check the change log location exists
 	liquibase.contexts= # runtime contexts to use
+	liquibase.labels= # runtime labels to use
 	liquibase.default-schema= # default database schema to use
 	liquibase.drop-first=false
 	liquibase.enabled=true
 	liquibase.url= # specific JDBC url (if not set the default datasource is used)
 	liquibase.user= # user name for liquibase.url
 	liquibase.password= # password for liquibase.url
+	liquibase.parameters= # change log parameters
 
 	# JMX
 	spring.jmx.default-domain= # JMX domain name