@Override public void resolve( final Throwable throwable, final JsonWriter jsonWriter) { final TruncatingBufferedPrintWriter srcWriter = srcWriterRecycler.acquire(); try { throwable.printStackTrace(srcWriter); final TruncatingBufferedPrintWriter dstWriter = truncate(srcWriter); jsonWriter.writeString(dstWriter); } finally { srcWriterRecycler.release(srcWriter); } } private TruncatingBufferedPrintWriter truncate( final TruncatingBufferedPrintWriter srcWriter) { // ... // Allocate temporary buffers and truncate the input. final TruncatingBufferedPrintWriter dstWriter = dstWriterRecycler.acquire(); try { // ... } finally { dstWriterRecycler.release(dstWriter); } return dstWriter; }