Converting a large java object to String containing json format

[coded9]

               Gson gson = null;
		GsonBuilder gsonBuilder = new GsonBuilder();
		gson = gsonBuilder.serializeNulls().create();
		return gson.toJson(this);

this refers to a large java object,I get out of memory exception while converting,also our heap size is 1 GB.Any workaround for this ?

[JakeWharton]

There are overloads of toJson which take destination streams that you can write directly to. This saves having to create an intermediate String object and will work better on low-memory environments and with extremely large JSON objects.

[coded9]

I did use this method in the below mentioned code,but it seems to use more memory compared to (gson.toJson(this))

GsonBuilder gsonBuilder = new GsonBuilder();
		gson = gsonBuilder.serializeNulls().create();
		//return gson.toJson(this);
		// OutputStream out = new ByteArrayOutputStream();
		 ByteArrayOutputStream outt = new ByteArrayOutputStream();
		JsonWriter writer = new JsonWriter(new OutputStreamWriter(outt, "UTF-8"));
        writer.beginArray();
       
            gson.toJson(this, this.getClass(), writer);
        
        writer.endArray();
        writer.close();

[JakeWharton]

That still buffers the entire payload in memory as bytes. The stream should be hooked up to your destination such as a file or socket.

…

On Tue, Oct 24, 2017, 12:01 PM Ashok Borra ***@***.***> wrote: I did use this method in the below mentioned code,but it seems to use more memory compared to (gson.toJson(this)) GsonBuilder gsonBuilder = new GsonBuilder(); gson = gsonBuilder.serializeNulls().create(); //return gson.toJson(this); // OutputStream out = new ByteArrayOutputStream(); ByteArrayOutputStream outt = new ByteArrayOutputStream(); JsonWriter writer = new JsonWriter(new OutputStreamWriter(outt, "UTF-8")); writer.beginArray(); gson.toJson(this, this.getClass(), writer); writer.endArray(); writer.close(); — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#1176 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEEEQS5H8nqjvmcOV36p3IiteTNT6Llks5svcN0gaJpZM4QCsMU> .

[coded9]

In the end state we need it as a String,what approach do you suggest ?

[JakeWharton]

There's no magic fix. You either need a larger heap or a smaller object.

…

On Tue, Oct 24, 2017, 1:05 PM Ashok Borra ***@***.***> wrote: In the end state we need it as a String,what approach do you suggest ? — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#1176 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEEEWhvmPTTtvQWIUu8O4dWVgcUGRZZks5svdKJgaJpZM4QCsMU> .