childCount.groovy

import java.io.InputStream;
import java.util.concurrent.atomic.AtomicInteger
import org.apache.jackrabbit.oak.api.Type
import org.apache.jackrabbit.oak.plugins.segment.SegmentBlob
import org.apache.jackrabbit.oak.spi.state.NodeState

def countNodes(NodeState n, deep = false, String path = "/", Integer flush = 50000, AtomicInteger count = new AtomicInteger(0), AtomicInteger binaries = new AtomicInteger(0), root = true) {
  if(root) {
    println "Counting nodes in tree ${path}"
  }

  cnt = count.incrementAndGet()
  if (cnt % flush == 0) println("  " + cnt)

  try {
    for(prop in n.getProperties()) {
      if(prop.getType() == Type.BINARY || prop.getType() == Type.BINARIES) {
        for(b in prop.getValue(Type.BINARIES)) {
          binaries.incrementAndGet()
          if(deep) {
              InputStream s = b.getNewStream();
              try {
                byte[] buffer = new byte[1024];
                int l = s.read(buffer, 0, buffer.length);
              } finally {
                s.close();
              }
          } else if(b instanceof SegmentBlob) {
            if(!((SegmentBlob)b).isExternal()) {
              b.length()
            }
          } else {
            b.length()
          }
        }
      }
    }

    for(child in n.getChildNodeEntries()) {
      countNodes(child.getNodeState(), deep, path + child.getName() + "/", flush, count, binaries, false)
    }
  } catch(e) {
    println "warning unable to read node ${path}"
  }

  if(root) {
    println "Total nodes in tree ${path}: ${cnt}"
    println "Total binaries in tree ${path}: ${binaries.get()}"
  }

  return cnt
}

:load https://gist.githubusercontent.com/stillalex/e7067bcb86c89bef66c8/raw/d7a5a9b839c3bb0ae5840252022f871fd38374d3/childCount.groovy
countNodes(session.workingNode)

for deep binary check:

:load https://gist.githubusercontent.com/stillalex/e7067bcb86c89bef66c8/raw/d7a5a9b839c3bb0ae5840252022f871fd38374d3/childCount.groovy
countNodes(session.workingNode, true)