org.infinispan.commands.functional.WriteOnlyManyCommand Maven / Gradle / Ivy

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package org.infinispan.commands.functional;

import org.infinispan.commands.Visitor;
import org.infinispan.commons.api.functional.EntryView.WriteEntryView;
import org.infinispan.commons.marshall.MarshallUtil;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.context.InvocationContext;
import org.infinispan.functional.impl.EntryViews;
import org.infinispan.lifecycle.ComponentStatus;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Consumer;

public final class WriteOnlyManyCommand extends AbstractWriteManyCommand {

   public static final byte COMMAND_ID = 56;

   private Set keys;
   private Consumer> f;

   public WriteOnlyManyCommand(Set keys, Consumer> f) {
      this.keys = keys;
      this.f = f;
   }

   public WriteOnlyManyCommand(WriteOnlyManyCommand command) {
      this.keys = command.getKeys();
      this.f = command.f;
   }

   public WriteOnlyManyCommand() {
   }

   public Set getKeys() {
      return keys;
   }

   public void setKeys(Set keys) {
      this.keys = keys;
   }

   @Override
   public byte getCommandId() {
      return COMMAND_ID;
   }

   @Override
   public void writeTo(ObjectOutput output) throws IOException {
      MarshallUtil.marshallCollection(keys, output);
      output.writeObject(f);
      output.writeBoolean(isForwarded);
   }

   @Override
   public void readFrom(ObjectInput input) throws IOException, ClassNotFoundException {
      keys = MarshallUtil.unmarshallCollectionUnbounded(input, HashSet::new);
      f = (Consumer>) input.readObject();
      isForwarded = input.readBoolean();
   }

   @Override
   public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
      return visitor.visitWriteOnlyManyCommand(ctx, this);
   }

   @Override
   public Object perform(InvocationContext ctx) throws Throwable {
      // Can't return a lazy stream here because the current code in
      // EntryWrappingInterceptor expects any changes to be done eagerly,
      // otherwise they're not applied. So, apply the function eagerly and
      // return a lazy stream of the void returns.

      // TODO: Simplify with a collect() call
      List returns = new ArrayList<>(keys.size());
      keys.forEach(k -> {
         CacheEntry cacheEntry = ctx.lookupEntry(k);

         // Could be that the key is not local, 'null' is how this is signalled
         if (cacheEntry != null) {
            f.accept(EntryViews.writeOnly(cacheEntry));
            returns.add(null);
         }
      });
      return returns.stream();
   }

   @Override
   public boolean isReturnValueExpected() {
      return false;  // TODO: Customise this generated block
   }

   @Override
   public boolean canBlock() {
      return false;  // TODO: Customise this generated block
   }

   @Override
   public Set