refactor(util/docker): add try-catch wrappers around image pull

src/main/java/de/hftstuttgart/utils/DockerUtil.java

@@ -2,6 +2,7 @@ package de.hftstuttgart.utils;
 
 import com.github.dockerjava.api.DockerClient;
 import com.github.dockerjava.api.command.CreateContainerResponse;
+import com.github.dockerjava.api.exception.DockerException;
 import com.github.dockerjava.api.model.Bind;
 import com.github.dockerjava.api.model.HostConfig;
 import com.github.dockerjava.core.DefaultDockerClientConfig;
@@ -40,18 +41,33 @@ public class DockerUtil {
     public int runContainer(String image, Bind... binds) throws InterruptedException, IOException
     {
         LOG.debug(String.format("pull image: %s", image));
-        dockerClient.pullImageCmd(image)
-            .start()
-            .awaitCompletion()
-            .close();
+        try {
+            dockerClient.pullImageCmd(image)
+                .start()
+                .awaitCompletion()
+                .close();
+        } catch (DockerException e) {
+            LOG.error(String.format(
+                "pulling docker image %s failed with %s, trying with local image",
+                image,
+                e.getMessage()));
+        }
 
         LOG.debug("creating container");
-        CreateContainerResponse containerResponse = dockerClient.createContainerCmd("testcontainer")
-            .withImage(image)
-            .withHostConfig(
-                HostConfig.newHostConfig()
-                    .withBinds(binds))
-            .exec();
+        CreateContainerResponse containerResponse;
+        try {
+            containerResponse = dockerClient.createContainerCmd("testcontainer")
+                .withImage(image)
+                .withHostConfig(
+                    HostConfig.newHostConfig()
+                        .withBinds(binds))
+                .exec();
+        } catch (DockerException e) {
+            LOG.error(String.format(
+                "Creating Docker Testrunner container failed with %s", e.getMessage()));
+            throw e;
+        }
+
         LOG.debug(String.format("container created: %s", containerResponse.getId()));
 
         LOG.debug(String.format("starting container %s", containerResponse.getId()));