diff --git a/cache/cache.h b/cache/cache.h
new file mode 100644
index 0000000..97b3ffe
--- /dev/null
+++ b/cache/cache.h
@@ -0,0 +1,46 @@
+#ifndef CACHE_H
+#define CACHE_H
+
+/* A cached version of the global state database (object table, task log, task
+ * table). */
+typedef db_cache_impl db_cache;
+
+/* These are the error codes the methods can return. */
+#define CACHE_NOT_FOUND -1
+#define CACHE_OK 0
+
+/* Return an array of plasma managers that have the object (the last parameter
+ * is an out parameter, which is assumed to be an array we append to). */
+int cached_object_table_get(db_cache *db,
+                            object_id object_id,
+                            UT_array *managers);
+
+/* Register a new object with the cache. */
+void cached_object_table_add(db_cache *db, object_id object_id, node_id node);
+
+/* Initially add a task to the task log cache. */
+void cached_task_log_add_task(db_cache *db,
+                              task_iid task_iid,
+                              task_spec *task,
+                              task_status task_status);
+
+/* Update task in the task log cache. This will append the new status to the
+ * task log cache. */
+void cached_task_log_update_task(db_cache *db,
+                                 task_iid task_iid,
+                                 task_status status);
+
+/* Get task from the task log cache. The last two parameters are out parameters,
+ * which are both assumed to be allocated. */
+int cached_task_log_get_task(db_cache *db,
+                             task_iid task_iid,
+                             task_spec *task,
+                             task_status *status);
+
+/* Add task to the task table cache. */
+void chached_task_table_add_task(db_cache *db, task_spec *task);
+
+/* Get specific task from the task table cache. */
+int cached_task_table_get_task(db_cache *db, task_id task_id, task_spec *out);
+
+#endif /* CACHE_H */