deps: upgrade gax to 2.7.1, protobuf to 3.19.1, grpc to 1.42.1, and truth to 1.1.2, upgrade Bazel in GitHub Actions, and fix build error

.github/workflows/ci.yaml

@@ -7,11 +7,6 @@ name: ci
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: gcr.io/gapic-images/googleapis-bazel:20210105
-    # Dockerfile for this image: https://github.com/googleapis/googleapis-discovery/blob/main/Dockerfile
-    # If you update its version, please also update it below in
-    # 'Cache Bazel files' - unfortunately it cannot accept variables at this
-    # time.
 
     strategy:
       matrix:
@@ -28,7 +23,7 @@ jobs:
         uses: actions/cache@v2
         with:
           path: ~/.cache/bazel
-          key: ${{ runner.os }}-bazel-20210105-${{ secrets.CACHE_VERSION }}
+          key: ${{ runner.os }}-${{ secrets.CACHE_VERSION }}
 
       - name: Bazel Cache Not Found
         if: steps.cache-bazel.outputs.cache-hit != 'true'

WORKSPACE

@@ -33,7 +33,7 @@ jvm_maven_import_external(
 # which in its turn, prioritizes actual generated clients runtime dependencies
 # over the generator dependencies.
 
-_gax_java_version = "2.7.0"
+_gax_java_version = "2.7.1"
 
 http_archive(
     name = "com_google_api_gax_java",
@@ -65,7 +65,27 @@ load("//:repositories.bzl", "gapic_generator_java_repositories")
 gapic_generator_java_repositories()
 
 # protobuf
-load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
+RULES_JVM_EXTERNAL_TAG = "4.2"
+RULES_JVM_EXTERNAL_SHA = "cd1a77b7b02e8e008439ca76fd34f5b07aecb8c752961f9640dea15e9e5ba1ca"
+
+http_archive(
+    name = "rules_jvm_external",
+    strip_prefix = "rules_jvm_external-%s" % RULES_JVM_EXTERNAL_TAG,
+    sha256 = RULES_JVM_EXTERNAL_SHA,
+    url = "https://github.com/bazelbuild/rules_jvm_external/archive/%s.zip" % RULES_JVM_EXTERNAL_TAG,
+)
+
+load("@com_google_protobuf//:protobuf_deps.bzl", "PROTOBUF_MAVEN_ARTIFACTS", "protobuf_deps")
+
+load("@rules_jvm_external//:defs.bzl", "maven_install")
+
+maven_install(
+    artifacts = PROTOBUF_MAVEN_ARTIFACTS,
+    generate_compat_repositories = True,
+    repositories = [
+        "https://repo.maven.apache.org/maven2/",
+    ],
+)
 
 protobuf_deps()
 

dependencies.properties

@@ -7,19 +7,19 @@
 # Target workspace name: gapic_generator_java
 
 # Versions only, for dependencies which actual artifacts differ between Bazel and Gradle
-version.com_google_protobuf=3.15.8
+version.com_google_protobuf=3.19.1
 # Version of google-java-format is downgraded from 1.8 to 1.7, because 1.8 supports java 11 minimum, while our JRE is java 8.
 version.google_java_format=1.7
 version.com_google_api_common_java=1.9.3
-version.io_grpc_java=1.30.2
+version.io_grpc_java=1.42.1
 
 # Common deps.
 maven.com_google_guava_guava=com.google.guava:guava:30.1-android
 maven.com_google_code_findbugs_jsr305=com.google.code.findbugs:jsr305:3.0.0
 maven.com_google_auto_value_auto_value=com.google.auto.value:auto-value:1.7.2
 maven.com_google_auto_value_auto_value_annotations=com.google.auto.value:auto-value-annotations:1.7.2
 maven.com_google_code_gson=com.google.code.gson:gson:2.8.6
-maven.com_google_protobuf_protobuf_java=com.google.protobuf:protobuf-java:3.15.8
+maven.com_google_protobuf_protobuf_java=com.google.protobuf:protobuf-java:3.19.1
 maven.io_github_java_diff_utils=io.github.java-diff-utils:java-diff-utils:4.0
 maven.javax_annotation_javax_annotation_api=javax.annotation:javax.annotation-api:1.3.2
 maven.javax_validation_javax_validation_api=javax.validation:validation-api:2.0.1.Final
@@ -37,4 +37,4 @@ maven.junit_junit=junit:junit:4.13.1
 maven.org_hamcrest_hamcrest_core=org.hamcrest:hamcrest-core:1.3
 maven.org_mockito_mockito_core=org.mockito:mockito-core:2.21.0
 # Keep in sync with gax-java.
-maven.com_google_truth_truth=com.google.truth:truth:1.0
+maven.com_google_truth_truth=com.google.truth:truth:1.1.2

repositories.bzl

@@ -109,7 +109,7 @@ def gapic_generator_java_repositories():
     )
 
     # grpc-proto doesn't have releases, so we use hashes instead.
-    _io_grpc_proto_prefix = "0020624375a8ee4c7dd9b3e513e443b90bc28990"  # Aug. 20, 2020.
+    _io_grpc_proto_prefix = "8e3fec8612bc0708e857950dccadfd5063703e04"  # Nov. 6, 2021.
     _maybe(
         http_archive,
         name = "io_grpc_proto",

src/main/java/com/google/api/generator/gapic/composer/rest/HttpJsonServiceStubClassComposer.java

@@ -474,7 +474,7 @@ private MethodInvocationExpr getExpr(VariableExpr var, String num) {
   private List<Expr> setOperationSnapshotFactoryExpr(
       Method protoMethod, Map<String, Message> messageTypes) {
 
-    // Generate input varibles for create()
+    // Generate input variables for create()
     VariableExpr requestVarExpr =
         VariableExpr.withVariable(
             Variable.builder().setType(protoMethod.inputType()).setName("request").build());