Add global state accessor of jobs (#8401)

python/ray/includes/global_state_accessor.pxd

@@ -0,0 +1,13 @@
+from libcpp.string cimport string as c_string
+from libcpp cimport bool as c_bool
+from libcpp.vector cimport vector as c_vector
+
+cdef extern from "ray/gcs/gcs_client/global_state_accessor.h" nogil:
+    cdef cppclass CGlobalStateAccessor "ray::gcs::GlobalStateAccessor":
+        CGlobalStateAccessor(const c_string &redis_address,
+                    const c_string &redis_password,
+                    c_bool is_test)
+        c_bool Connect()
+        void Disconnect()
+        c_vector[c_string] GetAllJobInfo()
+

python/ray/includes/global_state_accessor.pxi

@@ -0,0 +1,24 @@
+from ray.includes.global_state_accessor cimport (
+    CGlobalStateAccessor,
+)
+
+cdef class GlobalStateAccessor:
+    """Cython wrapper class of C++ `ray::gcs::GlobalStateAccessor`."""
+    cdef:
+        unique_ptr[CGlobalStateAccessor] inner
+
+    def __init__(self, redis_address, redis_password, c_bool is_test_client=False):
+        if not redis_password:
+            redis_password = ""
+        self.inner.reset(
+            new CGlobalStateAccessor(redis_address.encode("ascii"),
+                redis_password.encode("ascii"), is_test_client))
+
+    def connect(self):
+        return self.inner.get().Connect()
+
+    def disconnect(self):
+        self.inner.get().Disconnect()
+
+    def get_job_table(self):
+        return self.inner.get().GetAllJobInfo()