From 3759718634217a40699318cc187bb5bff873f262 Mon Sep 17 00:00:00 2001
From: drotos <drotos@a7169a2c-3604-0410-bc95-c702d8d87f7a>
Date: Sun, 4 Feb 2007 17:23:35 +0000
Subject: [PATCH] implement slave side of message passing

git-svn-id: svn+ssh://cvs.lpds.sztaki.hu/var/lib/svn/szdg/dcapi/trunk@1030 a7169a2c-3604-0410-bc95-c702d8d87f7a
---
 dcapi/local/local_client.c | 166 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 164 insertions(+), 2 deletions(-)

diff --git a/dcapi/local/local_client.c b/dcapi/local/local_client.c
index e363bbe022..7cc722177c 100644
--- a/dcapi/local/local_client.c
+++ b/dcapi/local/local_client.c
@@ -22,6 +22,8 @@
 #include <dc_client.h>
 
 #include "local_common.h"
+/*#include "local_slave.h"*/
+#include "local_utils.h"
 
 
 static int _DC_checkpoint_file_requested= 0;
@@ -63,13 +65,35 @@ unsigned DC_getGridCapabilities(void)
 /********************************************************************
  * Client API functions
  */
-
+/*done*/
 int DC_initClient(void)
 {
+	char *message;
+	int ret= _DC_parseCfg(CLIENT_CONFIG_NAME);
+
+	if (ret)
+		fprintf(stderr, "Error parsing configfile %s",
+			CLIENT_CONFIG_NAME);
+
+	_DC_init_utils();
 	_DC_init_common();
-	return 0;
+
+	DC_log(LOG_DEBUG, "Slave dcapi initialized");
+
+	message= _DC_read_message(_DC_cfg(cfg_management_box),
+				  _DCAPI_MSG_COMMAND, /*FALSE*/0);
+	if (message &&
+	    strcmp(message, _DCAPI_CMD_RESUME) == 0)
+	{
+		DC_log(LOG_INFO, "Resume, restarting...");
+		_DC_read_message(_DC_cfg(cfg_management_box),
+				 _DCAPI_MSG_COMMAND, /*TRUE*/1);
+	}
+
+	return ret;
 }
 
+/*done*/
 char *DC_resolveFileName(DC_FileType type, const char *logicalFileName)
 {
 	/* init_log calls this fn, so it is not possible to call DC_log
@@ -144,32 +168,170 @@ char *DC_resolveFileName(DC_FileType type, const char *logicalFileName)
 */
 }
 
+/*done*/
 int DC_sendResult(const char *logicalFileName, const char *path, DC_FileMode fileMode)
 {
+	char *fn;
+	int ret;
+
+	DC_log(LOG_DEBUG, "DC_sendResult(%s,%s,%d)",
+	       logicalFileName,
+	       path,
+	       fileMode);
+	fn= malloc(strlen(logicalFileName)+100);
+	strcpy(fn, _DC_cfg(cfg_subresults_box));
+	strcat(fn, "/real_files");
+	if ((ret= _DC_mkdir_with_parents(fn, S_IRWXU|
+					 S_IRGRP|S_IXGRP|
+					 S_IROTH|S_IXOTH)) != DC_OK)
+	{
+		DC_log(LOG_ERR, "Failed to create dir for subresult (%s): %s",
+		       fn, strerror(errno));
+		free(fn);
+		return(ret);
+	}
+	strcat(fn, "/");
+	strcat(fn, logicalFileName);
+	if ((ret= _DC_copyFile(path, fn)) != DC_OK)
+	{
+		DC_log(LOG_ERR, "Failed to copy subresult file %s to "
+		       "%s: %s", path, fn, strerror(errno));
+		free(fn);
+		return(ret);
+	}
+	ret= _DC_create_message(_DC_cfg(cfg_subresults_box),
+				_DCAPI_MSG_LOGICAL, logicalFileName, NULL);
+	free(fn);
+	return(ret);
+
 	// not implemented yet!
 
 	return DC_ERR_NOTIMPL;
 }
 
+/*done*/
 int DC_sendMessage(const char *message)
 {
+	DC_log(LOG_DEBUG, "DC_sendMessage(%s)", message);
+	return _DC_create_message(_DC_cfg(cfg_client_message_box),
+				  _DCAPI_MSG_MESSAGE, message, NULL);
 	// not implemented yet!
 
 	return DC_ERR_NOTIMPL;
 }
 
+/*done*/
 DC_ClientEvent *DC_checkClientEvent(void)
 {
+	char *message;
+	DC_ClientEvent *e= NULL;
+
+	message= _DC_read_message(_DC_cfg(cfg_master_message_box),
+				  _DCAPI_MSG_MESSAGE, /*TRUE*/1);
+	if (message)
+	{
+		if ((e= calloc(1, sizeof(DC_ClientEvent))))
+		{
+			DC_log(LOG_DEBUG, "API event created: %p", e);
+			e->type= DC_CLIENT_MESSAGE;
+			e->message= message;
+			DC_log(LOG_DEBUG, "Message of the event: %s",
+			       e->message);
+		}
+		else
+		{
+			free(message);
+			DC_log(LOG_ERR, "Failed to create "
+			       "API event, memory allocation "
+			       "error");
+		}
+		return(e);
+	}
+
+	message= _DC_read_message(_DC_cfg(cfg_management_box),
+				  _DCAPI_MSG_COMMAND, /*TRUE*/1);
+	if (message &&
+	    strcmp(message, _DCAPI_CMD_SUSPEND) == 0)
+	{
+		char *fn;
+		int f;
+
+		DC_log(LOG_INFO, "Master asked me to suspend");
+		_DC_create_message(_DC_cfg(cfg_management_box),
+				   _DCAPI_MSG_ACK,
+				   _DCAPI_ACK_SUSPEND,
+				   NULL);
+
+		fn= DC_resolveFileName(DC_FILE_IN, DC_CHECKPOINT_FILE);
+		if (fn != NULL)
+			free(fn);
+		else
+		{
+			DC_log(LOG_WARNING, "Slave suspending but "
+			       "no checkpoint made yet");
+			free(fn);
+		}
+
+		fflush(NULL);
+		fn= DC_resolveFileName(DC_FILE_OUT, DC_LABEL_STDOUT);
+		if (fn)
+		{
+			if ((f= open(fn, O_APPEND)) > 0)
+			{
+				fsync(f);
+				close(f);
+			}
+			free(fn);
+		}
+		_DC_create_message(_DC_cfg(cfg_output_cache),
+				   DC_LABEL_STDOUT,
+				   NULL,
+				   DC_LABEL_STDOUT);
+		fn= DC_resolveFileName(DC_FILE_OUT, DC_LABEL_STDERR);
+		if (fn)
+		{
+			if ((f= open(fn, O_APPEND)) > 0)
+			{
+				fsync(f);
+				close(f);
+			}
+			free(fn);
+		}
+		_DC_create_message(_DC_cfg(cfg_output_cache),
+				   DC_LABEL_STDERR,
+				   NULL,
+				   DC_LABEL_STDERR);
+
+		DC_finishClient(0);
+	}
 	// not implemented yet!
 
 	return NULL;
 }
 
+/*done*/
 void DC_destroyClientEvent(DC_ClientEvent *event)
 {
+	DC_log(LOG_DEBUG, "DC_destroyClientEvent(%p)", event);
+	if (event)
+	{
+		switch (event->type)
+		{
+		case DC_CLIENT_MESSAGE:
+		{
+			if (event->message)
+				free(event->message);
+			break;
+		}
+		default:
+			break;
+		}
+		free(event);
+	}
 	// not implemented yet!
 }
 
+/*done*/
 void DC_checkpointMade(const char *fileName)
 {
 	DC_log(LOG_DEBUG, "DC_checkpointMade(%s)", fileName);