Including in Spring Boot project

[gboersma]

Including the java-sdk as a dependency for a Spring Boot project builds properly, but results in a "NoSuchMethodError: Companion" exception at run-time when initializing an instance of the DaprHttp.

From investigation, it appears that this has to do with the okhttp library and version mismatches:

Without Spring Boot:

[INFO]    \- com.squareup.okhttp3:okhttp:jar:4.9.0:compile
[INFO]       +- com.squareup.okio:okio:jar:2.8.0:compile
[INFO]       |  \- org.jetbrains.kotlin:kotlin-stdlib-common:jar:1.4.0:compile
[INFO]       \- org.jetbrains.kotlin:kotlin-stdlib:jar:1.4.10:compile
[INFO]          \- org.jetbrains:annotations:jar:13.0:compile

With Spring Boot:

[INFO]    \- com.squareup.okhttp3:okhttp:jar:3.14.9:compile
[INFO]       \- com.squareup.okio:okio:jar:1.17.2:compile

Adding this explicit dependency to the POM fixed the problem:

        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>4.9.0</version>
        </dependency>

I am scratching my head why this happens since a standalone Spring Boot project does not include the okhttp library, so I am not sure why a Spring Boot + Java SDK project would downgrade this dependency, and I was unable to determine it using the Maven dependency tool.

Referencing the dependency explicitly does fix the problem. Two asks:

1. Investigate if there is a better way to resolve this issue.
2. Add a note to the README to help others avoid this issue.

[mthmulders]

Duplicate of #515. You can work-around this by changing the Spring Boot version to one that uses a compatible OkHTTP version, or force a compatible OkHttp version in your project by adding the following dependency:

    <dependency>
      <groupId>com.squareup.okhttp3</groupId>
      <artifactId>okhttp</artifactId>
      <version>4.9.0</version>
    </dependency>

[artursouza]

We had a note on this in the README.md file. Please, add it again.

[mthmulders]

To add a bit more detail regarding your first question: I believe the OkHttp dependency that you see when you do have Spring Boot is "managed" by the Spring Boot "Bill of Materials".