https://blog.sznapka.pl/injecting-repositories-to-service-in-symfony2/ code snippets

di.xml

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="[..]">

    <parameters>
        <parameter key="example.foo.repository.class">
            Example\FooBundle\Repository\FooRepository</parameter>
        <parameter key="example.foo.service.class">
            Example\FooBundle\Service\FooService</parameter>
    </parameters>

    <services>
        <service id="example.foo.repository"
                 class="%example.foo.repository.class%"
                 factory-service="doctrine.orm.entity_manager"
                 factory-method="getRepository">
                <argument>ExampleFooBundle:Foo</argument>
        </service>

        <service id="example.foo.service"
                 class="%example.foo.service.class%">
            <argument type="service" id="example.foo.repository" />
            <argument type="service" id="logger" />
        </service>
    </services>
</container>