queue changes

app.py

@@ -244,9 +244,9 @@ def on_next(docs_cache, idx: int, reader_iter, require_has_math: bool, require_h
 
 
 with gr.Blocks() as demo:
-    idx_state = gr.State(value=-1)
-    docs_state = gr.State(value=[])
-    iter_state = gr.State(value=None)
+    idx_state = gr.State(value=-1, time_to_live=900)
+    docs_state = gr.State(value=[], time_to_live=900)
+    iter_state = gr.State(value=None, time_to_live=900)
 
     with gr.Row():
         # Full-width controls row for navigation
@@ -277,17 +277,20 @@ with gr.Blocks() as demo:
             right_iframe = gr.HTML(label="Original Page")
             right_infoboxes = gr.JSON(label="Infoboxes")
 
-    language_select.change(on_select_language, inputs=[language_select, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe])
-    demo.load(on_select_language, inputs=[language_select, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe])
-    find_btn.click(on_find, inputs=[docs_state, idx_state, iter_state, id_input, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe])
+    language_select.change(on_select_language, inputs=[language_select, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe], concurrency_limit=1)
+    demo.load(on_select_language, inputs=[language_select, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe], concurrency_limit=1)
+    find_btn.click(on_find, inputs=[docs_state, idx_state, iter_state, id_input, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe], concurrency_limit=1)
 
     # Visibility toggles driven directly by checkbox changes
     show_wiki.change(lambda v: gr.update(visible=v), inputs=[show_wiki], outputs=[right_markdown])
     show_preview.change(lambda v: gr.update(visible=v), inputs=[show_preview], outputs=[right_iframe])
     show_infoboxes.change(lambda v: gr.update(visible=v), inputs=[show_infoboxes], outputs=[right_infoboxes])
-    prev_btn.click(on_prev, inputs=[docs_state, idx_state, iter_state, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe])
-    next_btn.click(on_next, inputs=[docs_state, idx_state, iter_state, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe])
+    prev_btn.click(on_prev, inputs=[docs_state, idx_state, iter_state, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe], concurrency_limit=1)
+    next_btn.click(on_next, inputs=[docs_state, idx_state, iter_state, require_has_math, require_has_infobox], outputs=[idx_state, docs_state, iter_state, left_text, left_meta, header_md, right_markdown, right_infoboxes, right_iframe], concurrency_limit=1)
+
+    # Enable global queue to coordinate concurrent requests safely
+    demo.queue(default_concurrency_limit=1, max_size=128)
 
 
 if __name__ == "__main__":
-    demo.launch(server_name="0.0.0.0", server_port=7641)
+    demo.launch(server_name="0.0.0.0", server_port=7641, state_session_capacity=5000)