Question

This post describes how to update two databases from maven using liquibase:
liquibase using maven with two databases
However, when I try the exact same configuration in my pom.xml (included below) it does not work. I get this error when running ‘mvn liquibase:update’:

The driver has not been specified either as a parameter or in a properties file.

Running with verbose set to true I get:

[INFO] Settings----------------------------
[INFO]     driver: null
[INFO]     url: null
[INFO]     username: null
[INFO]     password: null

so looks like the configuration is not being passed to liquibase. If the configuration part is outside executions it works, but that defeats the whole idea of having multiple executions – you would want to use different configurations for different executions.

  <plugin>
    <groupId>org.liquibase</groupId>
    <artifactId>liquibase-plugin</artifactId>
    <version>1.9.5.0</version>

    <executions>
      <execution>
        <phase>process-resources</phase>
        <id>one</id>
        <goals>
          <goal>update</goal>
        </goals>
        <configuration>
          <changeLogFile>src/main/resources/liquibase/changelog-master.xml</changeLogFile>
          <driver>com.mysql.jdbc.Driver</driver>
          <url>jdbc:mysql://127.0.0.1:3306/${database.development}</url>
          <username>wifi_offload_app</username>
          <password />
          <dropFirst>${liquibase.dropFirst}</dropFirst>
        </configuration>
      </execution>
      <execution>
        <phase>process-resources</phase>
        <id>two</id>
        <goals>
          <goal>update</goal>
        </goals>
        <configuration>
          <changeLogFile>src/main/resources/liquibase/changelog-master-sbr.xml</changeLogFile>
          <driver>com.mysql.jdbc.Driver</driver>
          <url>jdbc:mysql://127.0.0.1:3307/${database.development.sbr}</url>
          <username>wifi_offload_app</username>
          <password />
          <dropFirst>${liquibase.dropFirst}</dropFirst>
        </configuration>
      </execution>
    </executions>

    <dependencies>
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.12</version>
      </dependency>
    </dependencies>
  </plugin>

Thanks,
Hari

Update after trying ‘mvn process-resources’ from Mark’s comment. Here’s the output from mvn updating both databases.

[hariharan@msg9]$ mvn process-resources
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Offload Manager Service
[INFO]    task-segment: [process-resources]
[INFO] ------------------------------------------------------------------------
[INFO] [resources:resources {execution: default-resources}]
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 12 resources
[INFO] [liquibase:update {execution: one}]
[INFO] ------------------------------------------------------------------------
[INFO] Executing on Database: jdbc:mysql://127.0.0.1:3306/db1
Mar 7, 2012 4:11:47 PM liquibase.database.template.JdbcTemplate comment
INFO: Create Database Lock Table
Mar 7, 2012 4:11:47 PM liquibase.database.template.JdbcTemplate comment
INFO: Lock Database
Mar 7, 2012 4:11:47 PM liquibase.lock.LockHandler acquireLock
INFO: Successfully acquired change log lock
Mar 7, 2012 4:11:47 PM liquibase.database.template.JdbcTemplate comment
INFO: Create Database Change Log Table
Mar 7, 2012 4:11:47 PM liquibase.database.AbstractDatabase checkDatabaseChangeLogTable
INFO: Creating database history table with name: `DATABASECHANGELOG`
Mar 7, 2012 4:11:48 PM liquibase.database.AbstractDatabase getRanChangeSetList
INFO: Reading from `DATABASECHANGELOG`
Mar 7, 2012 4:11:48 PM liquibase.database.template.JdbcTemplate comment
INFO: Changeset liquibase/changelogs/1328053095_tables.xml::1328053095-1::hariharan::(MD5Sum: bf33ef8ba7352e8c0864e9457ee642b)
Mar 7, 2012 4:11:49 PM liquibase.database.template.JdbcTemplate comment
INFO: Changeset liquibase/changelogs/1328053095_tables.xml::1328053095-2::hariharan::(MD5Sum: 7cc4f84be549dbcea3589d85df3e059)
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Changeset liquibase/changelogs/1328053095_tables.xml::1328053095-3::hariharan::(MD5Sum: 59821447f5744410a1c36bccd16196f6)
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Release Database Lock
Mar 7, 2012 4:11:50 PM liquibase.lock.LockHandler releaseLock
INFO: Successfully released change log lock
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Release Database Lock
Mar 7, 2012 4:11:50 PM liquibase.lock.LockHandler releaseLock
INFO: Successfully released change log lock
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] [liquibase:update {execution: two}]
[INFO] ------------------------------------------------------------------------
[INFO] Executing on Database: jdbc:mysql://127.0.0.1:3307/db2
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Create Database Lock Table
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Lock Database
Mar 7, 2012 4:11:50 PM liquibase.lock.LockHandler acquireLock
INFO: Successfully acquired change log lock
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Create Database Change Log Table
Mar 7, 2012 4:11:50 PM liquibase.database.AbstractDatabase checkDatabaseChangeLogTable
INFO: Creating database history table with name: `DATABASECHANGELOG`
Mar 7, 2012 4:11:50 PM liquibase.database.AbstractDatabase getRanChangeSetList
INFO: Reading from `DATABASECHANGELOG`
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Changeset liquibase/changelogs-sbr/1330991147_tables.xml::1330991147-1::hariharan::(MD5Sum: 8cf69599bcf338b57d7fe1ecc1471d86)
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Changeset liquibase/changelogs-sbr/1330991147_tables.xml::1330991147-2::hariharan::(MD5Sum: cf9a9717987fda5deba07a7a943673e1)
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Release Database Lock
Mar 7, 2012 4:11:50 PM liquibase.lock.LockHandler releaseLock
INFO: Successfully released change log lock
Mar 7, 2012 4:11:50 PM liquibase.database.template.JdbcTemplate comment
INFO: Release Database Lock
Mar 7, 2012 4:11:50 PM liquibase.lock.LockHandler releaseLock
INFO: Successfully released change log lock
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6 seconds
[INFO] Finished at: Wed Mar 07 16:11:50 PST 2012
[INFO] Final Memory: 23M/180M
[INFO] ------------------------------------------------------------------------

Answer 1

Does your build need to update 2 databases in one go? An alternative approach is to use Maven profiles as follows:

mvn process-resources
mvn -Pdb2 process-resources

Project files

|-- pom.xml
`-- src
    `-- main
        `-- resources
            |-- com
            |   `-- myspotontheweb
            |       `-- db
            |           `-- changelog
            |               |-- db-changelog-1.0.xml
            |               `-- db-changelog-master.xml
            `-- liquibase.properties

I prefer to use Maven’s generate-resources phase to create a liquibase properties file.

pom.xml

Contains two profiles at the end containing the properties associated with the two databases. This solution scales to any number of db environments.

Another item of note is that liquibase uses the populated properties under the targets directory

<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.myspotontheweb.db</groupId>
    <artifactId>liquibase-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.3.162</version>
        </dependency>
    </dependencies>
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.liquibase</groupId>
                <artifactId>liquibase-maven-plugin</artifactId>
                <version>2.0.1</version>
                <executions>
                    <execution>
                        <phase>process-resources</phase>
                        <configuration>
                            <propertyFile>target/classes/liquibase.properties</propertyFile>
                            <promptOnNonLocalDatabase>false</promptOnNonLocalDatabase>
                        </configuration>
                        <goals>
                            <goal>update</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
    <profiles>
        <profile>
            <id>db1</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <liquibase.url>jdbc:h2:target/db1/liquibaseTest;AUTO_SERVER=TRUE</liquibase.url>
                <liquibase.driver>org.h2.Driver</liquibase.driver>
                <liquibase.username>user</liquibase.username>
                <liquibase.password>pass</liquibase.password>
            </properties>
        </profile>
        <profile>
            <id>db2</id>
            <properties>
                <liquibase.url>jdbc:h2:target/db2/liquibaseTest;AUTO_SERVER=TRUE</liquibase.url>
                <liquibase.driver>org.h2.Driver</liquibase.driver>
                <liquibase.username>user</liquibase.username>
                <liquibase.password>pass</liquibase.password>
            </properties>
        </profile>
    </profiles>
</project>

liquibase.properties

This is the template file populated with the profile property values for the specific environment.

# Database credentials
url=${liquibase.url}
driver=${liquibase.driver}
username=${liquibase.username}
password=${liquibase.password}

# Liquibase changelog
changeLogFile=com/myspotontheweb/db/changelog/db-changelog-master.xml

---

Update

And alternative strategy would be to run the plug-in directly, instead of integrating it into a Maven life-cycle.

mkdir target
mvn liquibase:update
mvn -Pdb2 liquibase:update

Again you are using a profile to control the property settings.

pom.xml

The difference is that the plug-ins settings are controlled by properties set in the profile. No more properties file created under the targets directory for shipment in your jar.

<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.myspotontheweb.db</groupId>
    <artifactId>liquibase-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.3.162</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.liquibase</groupId>
                <artifactId>liquibase-maven-plugin</artifactId>
                <version>2.0.1</version>
                <configuration>
                    <url>${liquibase.url}</url>
                    <driver>${liquibase.driver}</driver>
                    <username>${liquibase.username}</username>
                    <password>${liquibase.password}</password>
                    <changeLogFile>src/main/resources/com/myspotontheweb/db/changelog/db-changelog-master.xml</changeLogFile>
                    <promptOnNonLocalDatabase>false</promptOnNonLocalDatabase>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <profiles>
        <profile>
            <id>db1</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <liquibase.url>jdbc:h2:target/db1/liquibaseTest;AUTO_SERVER=TRUE</liquibase.url>
                <liquibase.driver>org.h2.Driver</liquibase.driver>
                <liquibase.username>user</liquibase.username>
                <liquibase.password>pass</liquibase.password>
            </properties>
        </profile>
        <profile>
            <id>db2</id>
            <properties>
                <liquibase.url>jdbc:h2:target/db2/liquibaseTest;AUTO_SERVER=TRUE</liquibase.url>
                <liquibase.driver>org.h2.Driver</liquibase.driver>
                <liquibase.username>user</liquibase.username>
                <liquibase.password>pass</liquibase.password>
            </properties>
        </profile>
    </profiles>
</project>