1 files changed, 122 insertions, 0 deletions
diff --git a/src/include/replication/output_plugin.h b/src/include/replication/output_plugin.h
new file mode 100644
index 0000000..3dd9236
--- /dev/null
+++ b/src/include/replication/output_plugin.h
@@ -0,0 +1,122 @@
+/*-------------------------------------------------------------------------
+ * output_plugin.h
+ *	   PostgreSQL Logical Decode Plugin Interface
+ *
+ * Copyright (c) 2012-2020, PostgreSQL Global Development Group
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef OUTPUT_PLUGIN_H
+#define OUTPUT_PLUGIN_H
+
+#include "replication/reorderbuffer.h"
+
+struct LogicalDecodingContext;
+struct OutputPluginCallbacks;
+
+typedef enum OutputPluginOutputType
+{
+	OUTPUT_PLUGIN_BINARY_OUTPUT,
+	OUTPUT_PLUGIN_TEXTUAL_OUTPUT
+} OutputPluginOutputType;
+
+/*
+ * Options set by the output plugin, in the startup callback.
+ */
+typedef struct OutputPluginOptions
+{
+	OutputPluginOutputType output_type;
+	bool		receive_rewrites;
+} OutputPluginOptions;
+
+/*
+ * Type of the shared library symbol _PG_output_plugin_init that is looked up
+ * when loading an output plugin shared library.
+ */
+typedef void (*LogicalOutputPluginInit) (struct OutputPluginCallbacks *cb);
+
+/*
+ * Callback that gets called in a user-defined plugin. ctx->private_data can
+ * be set to some private data.
+ *
+ * "is_init" will be set to "true" if the decoding slot just got defined. When
+ * the same slot is used from there one, it will be "false".
+ */
+typedef void (*LogicalDecodeStartupCB) (struct LogicalDecodingContext *ctx,
+										OutputPluginOptions *options,
+										bool is_init);
+
+/*
+ * Callback called for every (explicit or implicit) BEGIN of a successful
+ * transaction.
+ */
+typedef void (*LogicalDecodeBeginCB) (struct LogicalDecodingContext *ctx,
+									  ReorderBufferTXN *txn);
+
+/*
+ * Callback for every individual change in a successful transaction.
+ */
+typedef void (*LogicalDecodeChangeCB) (struct LogicalDecodingContext *ctx,
+									   ReorderBufferTXN *txn,
+									   Relation relation,
+									   ReorderBufferChange *change);
+
+/*
+ * Callback for every TRUNCATE in a successful transaction.
+ */
+typedef void (*LogicalDecodeTruncateCB) (struct LogicalDecodingContext *ctx,
+										 ReorderBufferTXN *txn,
+										 int nrelations,
+										 Relation relations[],
+										 ReorderBufferChange *change);
+
+/*
+ * Called for every (explicit or implicit) COMMIT of a successful transaction.
+ */
+typedef void (*LogicalDecodeCommitCB) (struct LogicalDecodingContext *ctx,
+									   ReorderBufferTXN *txn,
+									   XLogRecPtr commit_lsn);
+
+/*
+ * Called for the generic logical decoding messages.
+ */
+typedef void (*LogicalDecodeMessageCB) (struct LogicalDecodingContext *ctx,
+										ReorderBufferTXN *txn,
+										XLogRecPtr message_lsn,
+										bool transactional,
+										const char *prefix,
+										Size message_size,
+										const char *message);
+
+/*
+ * Filter changes by origin.
+ */
+typedef bool (*LogicalDecodeFilterByOriginCB) (struct LogicalDecodingContext *ctx,
+											   RepOriginId origin_id);
+
+/*
+ * Called to shutdown an output plugin.
+ */
+typedef void (*LogicalDecodeShutdownCB) (struct LogicalDecodingContext *ctx);
+
+/*
+ * Output plugin callbacks
+ */
+typedef struct OutputPluginCallbacks
+{
+	LogicalDecodeStartupCB startup_cb;
+	LogicalDecodeBeginCB begin_cb;
+	LogicalDecodeChangeCB change_cb;
+	LogicalDecodeTruncateCB truncate_cb;
+	LogicalDecodeCommitCB commit_cb;
+	LogicalDecodeMessageCB message_cb;
+	LogicalDecodeFilterByOriginCB filter_by_origin_cb;
+	LogicalDecodeShutdownCB shutdown_cb;
+} OutputPluginCallbacks;
+
+/* Functions in replication/logical/logical.c */
+extern void OutputPluginPrepareWrite(struct LogicalDecodingContext *ctx, bool last_write);
+extern void OutputPluginWrite(struct LogicalDecodingContext *ctx, bool last_write);
+extern void OutputPluginUpdateProgress(struct LogicalDecodingContext *ctx);
+
+#endif							/* OUTPUT_PLUGIN_H */