copy more actions to protocol.xpack (#32892)

this PR creates client-side instances of the following actions:

- DeleteAction
- ForceMergeAction
- ReadOnlyAction
- RolloverAction
- ForceMergeAction

AllocateAction was done separately

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/XPackClientPlugin.java

@@ -456,8 +456,23 @@ public class XPackClientPlugin extends Plugin implements ActionPlugin, NetworkPl
                 // ILM - Client - Lifecycle Actions
                 new NamedXContentRegistry.Entry(org.elasticsearch.protocol.xpack.indexlifecycle.LifecycleAction.class,
                     new ParseField(org.elasticsearch.protocol.xpack.indexlifecycle.AllocateAction.NAME),
-                        org.elasticsearch.protocol.xpack.indexlifecycle.AllocateAction::parse)
+                    org.elasticsearch.protocol.xpack.indexlifecycle.AllocateAction::parse),
-        );
+                new NamedXContentRegistry.Entry(org.elasticsearch.protocol.xpack.indexlifecycle.LifecycleAction.class,
+                    new ParseField(org.elasticsearch.protocol.xpack.indexlifecycle.DeleteAction.NAME),
+                    org.elasticsearch.protocol.xpack.indexlifecycle.DeleteAction::parse),
+                new NamedXContentRegistry.Entry(org.elasticsearch.protocol.xpack.indexlifecycle.LifecycleAction.class,
+                    new ParseField(org.elasticsearch.protocol.xpack.indexlifecycle.ForceMergeAction.NAME),
+                    org.elasticsearch.protocol.xpack.indexlifecycle.ForceMergeAction::parse),
+                new NamedXContentRegistry.Entry(org.elasticsearch.protocol.xpack.indexlifecycle.LifecycleAction.class,
+                    new ParseField(org.elasticsearch.protocol.xpack.indexlifecycle.ReadOnlyAction.NAME),
+                    org.elasticsearch.protocol.xpack.indexlifecycle.ReadOnlyAction::parse),
+                new NamedXContentRegistry.Entry(org.elasticsearch.protocol.xpack.indexlifecycle.LifecycleAction.class,
+                    new ParseField(org.elasticsearch.protocol.xpack.indexlifecycle.RolloverAction.NAME),
+                    org.elasticsearch.protocol.xpack.indexlifecycle.RolloverAction::parse),
+                new NamedXContentRegistry.Entry(org.elasticsearch.protocol.xpack.indexlifecycle.LifecycleAction.class,
+                    new ParseField(org.elasticsearch.protocol.xpack.indexlifecycle.ShrinkAction.NAME),
+                    org.elasticsearch.protocol.xpack.indexlifecycle.ShrinkAction::parse)
+            );
     }
 
     @Override

x-pack/protocol/src/main/java/org/elasticsearch/protocol/xpack/indexlifecycle/DeleteAction.java

@@ -0,0 +1,69 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.xcontent.ObjectParser;
+import org.elasticsearch.common.xcontent.ToXContent;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+
+public class DeleteAction extends LifecycleAction implements ToXContentObject {
+    public static final String NAME = "delete";
+
+    private static final ObjectParser<DeleteAction, Void> PARSER = new ObjectParser<>(NAME, DeleteAction::new);
+
+    public static DeleteAction parse(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
+    public DeleteAction() {
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, ToXContent.Params params) throws IOException {
+        builder.startObject();
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public int hashCode() {
+        return 1;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (obj.getClass() != getClass()) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+}

x-pack/protocol/src/main/java/org/elasticsearch/protocol/xpack/indexlifecycle/ForceMergeAction.java

@@ -0,0 +1,92 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public class ForceMergeAction extends LifecycleAction implements ToXContentObject {
+    public static final String NAME = "forcemerge";
+    private static final ParseField MAX_NUM_SEGMENTS_FIELD = new ParseField("max_num_segments");
+
+    private static final ConstructingObjectParser<ForceMergeAction, Void> PARSER = new ConstructingObjectParser<>(NAME,
+        false, a -> {
+        int maxNumSegments = (int) a[0];
+        return new ForceMergeAction(maxNumSegments);
+    });
+
+    static {
+        PARSER.declareInt(ConstructingObjectParser.constructorArg(), MAX_NUM_SEGMENTS_FIELD);
+    }
+
+    private final int maxNumSegments;
+
+    public static ForceMergeAction parse(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
+    public ForceMergeAction(int maxNumSegments) {
+        if (maxNumSegments <= 0) {
+            throw new IllegalArgumentException("[" + MAX_NUM_SEGMENTS_FIELD.getPreferredName()
+                + "] must be a positive integer");
+        }
+        this.maxNumSegments = maxNumSegments;
+    }
+
+    public int getMaxNumSegments() {
+        return maxNumSegments;
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.field(MAX_NUM_SEGMENTS_FIELD.getPreferredName(), maxNumSegments);
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(maxNumSegments);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (obj.getClass() != getClass()) {
+            return false;
+        }
+        ForceMergeAction other = (ForceMergeAction) obj;
+        return Objects.equals(maxNumSegments, other.maxNumSegments);
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+}

x-pack/protocol/src/main/java/org/elasticsearch/protocol/xpack/indexlifecycle/ReadOnlyAction.java

@@ -0,0 +1,68 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.xcontent.ObjectParser;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+
+public class ReadOnlyAction extends LifecycleAction implements ToXContentObject {
+    public static final String NAME = "readonly";
+
+    private static final ObjectParser<ReadOnlyAction, Void> PARSER = new ObjectParser<>(NAME, false, ReadOnlyAction::new);
+
+    public static ReadOnlyAction parse(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
+    public ReadOnlyAction() {
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public int hashCode() {
+        return ReadOnlyAction.class.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (obj.getClass() != getClass()) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+}

x-pack/protocol/src/main/java/org/elasticsearch/protocol/xpack/indexlifecycle/RolloverAction.java

@@ -0,0 +1,118 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.unit.ByteSizeValue;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
+import org.elasticsearch.common.xcontent.ObjectParser.ValueType;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+import java.util.Objects;
+
+
+public class RolloverAction extends LifecycleAction implements ToXContentObject {
+    public static final String NAME = "rollover";
+    private static final ParseField MAX_SIZE_FIELD = new ParseField("max_size");
+    private static final ParseField MAX_DOCS_FIELD = new ParseField("max_docs");
+    private static final ParseField MAX_AGE_FIELD = new ParseField("max_age");
+
+    private static final ConstructingObjectParser<RolloverAction, Void> PARSER = new ConstructingObjectParser<>(NAME,
+        a -> new RolloverAction((ByteSizeValue) a[0], (TimeValue) a[1], (Long) a[2]));
+    static {
+        PARSER.declareField(ConstructingObjectParser.optionalConstructorArg(),
+            (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_SIZE_FIELD.getPreferredName()), MAX_SIZE_FIELD, ValueType.VALUE);
+        PARSER.declareField(ConstructingObjectParser.optionalConstructorArg(),
+            (p, c) -> TimeValue.parseTimeValue(p.text(), MAX_AGE_FIELD.getPreferredName()), MAX_AGE_FIELD, ValueType.VALUE);
+        PARSER.declareLong(ConstructingObjectParser.optionalConstructorArg(), MAX_DOCS_FIELD);
+    }
+
+    private final ByteSizeValue maxSize;
+    private final Long maxDocs;
+    private final TimeValue maxAge;
+
+    public static RolloverAction parse(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
+    public RolloverAction(ByteSizeValue maxSize, TimeValue maxAge, Long maxDocs) {
+        if (maxSize == null && maxAge == null && maxDocs == null) {
+            throw new IllegalArgumentException("At least one rollover condition must be set.");
+        }
+        this.maxSize = maxSize;
+        this.maxAge = maxAge;
+        this.maxDocs = maxDocs;
+    }
+    public ByteSizeValue getMaxSize() {
+        return maxSize;
+    }
+
+    public TimeValue getMaxAge() {
+        return maxAge;
+    }
+
+    public Long getMaxDocs() {
+        return maxDocs;
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        if (maxSize != null) {
+            builder.field(MAX_SIZE_FIELD.getPreferredName(), maxSize.getStringRep());
+        }
+        if (maxAge != null) {
+            builder.field(MAX_AGE_FIELD.getPreferredName(), maxAge.getStringRep());
+        }
+        if (maxDocs != null) {
+            builder.field(MAX_DOCS_FIELD.getPreferredName(), maxDocs);
+        }
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(maxSize, maxAge, maxDocs);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (obj.getClass() != getClass()) {
+            return false;
+        }
+        RolloverAction other = (RolloverAction) obj;
+        return Objects.equals(maxSize, other.maxSize) &&
+            Objects.equals(maxAge, other.maxAge) &&
+            Objects.equals(maxDocs, other.maxDocs);
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+}

x-pack/protocol/src/main/java/org/elasticsearch/protocol/xpack/indexlifecycle/ShrinkAction.java

@@ -0,0 +1,84 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public class ShrinkAction extends LifecycleAction implements ToXContentObject {
+    public static final String NAME = "shrink";
+    private static final ParseField NUMBER_OF_SHARDS_FIELD = new ParseField("number_of_shards");
+
+    private static final ConstructingObjectParser<ShrinkAction, Void> PARSER =
+        new ConstructingObjectParser<>(NAME, a -> new ShrinkAction((Integer) a[0]));
+
+    static {
+        PARSER.declareInt(ConstructingObjectParser.constructorArg(), NUMBER_OF_SHARDS_FIELD);
+    }
+
+    private int numberOfShards;
+
+    public static ShrinkAction parse(XContentParser parser) throws IOException {
+        return PARSER.parse(parser, null);
+    }
+
+    public ShrinkAction(int numberOfShards) {
+        if (numberOfShards <= 0) {
+            throw new IllegalArgumentException("[" + NUMBER_OF_SHARDS_FIELD.getPreferredName() + "] must be greater than 0");
+        }
+        this.numberOfShards = numberOfShards;
+    }
+
+    int getNumberOfShards() {
+        return numberOfShards;
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.field(NUMBER_OF_SHARDS_FIELD.getPreferredName(), numberOfShards);
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ShrinkAction that = (ShrinkAction) o;
+        return Objects.equals(numberOfShards, that.numberOfShards);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(numberOfShards);
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+}

x-pack/protocol/src/test/java/org/elasticsearch/protocol/xpack/indexlifecycle/DeleteActionTests.java

@@ -0,0 +1,40 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.test.AbstractXContentTestCase;
+
+public class DeleteActionTests extends AbstractXContentTestCase<DeleteAction> {
+
+    @Override
+    protected DeleteAction createTestInstance() {
+        return new DeleteAction();
+    }
+
+    @Override
+    protected DeleteAction doParseInstance(XContentParser parser) {
+        return DeleteAction.parse(parser);
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+}

x-pack/protocol/src/test/java/org/elasticsearch/protocol/xpack/indexlifecycle/ForceMergeActionTests.java

@@ -0,0 +1,62 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.common.xcontent.DeprecationHandler;
+import org.elasticsearch.common.xcontent.XContentHelper;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.common.xcontent.XContentType;
+import org.elasticsearch.common.xcontent.json.JsonXContent;
+import org.elasticsearch.test.AbstractXContentTestCase;
+
+import java.io.IOException;
+
+import static org.hamcrest.Matchers.equalTo;
+
+public class ForceMergeActionTests extends AbstractXContentTestCase<ForceMergeAction> {
+
+    @Override
+    protected ForceMergeAction doParseInstance(XContentParser parser) {
+        return ForceMergeAction.parse(parser);
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+
+    @Override
+    protected ForceMergeAction createTestInstance() {
+        return new ForceMergeAction(randomIntBetween(1, 100));
+    }
+
+    public void testMissingMaxNumSegments() throws IOException {
+        BytesReference emptyObject = BytesReference.bytes(JsonXContent.contentBuilder().startObject().endObject());
+        XContentParser parser = XContentHelper.createParser(null, DeprecationHandler.THROW_UNSUPPORTED_OPERATION,
+            emptyObject, XContentType.JSON);
+        Exception e = expectThrows(IllegalArgumentException.class, () -> ForceMergeAction.parse(parser));
+        assertThat(e.getMessage(), equalTo("Required [max_num_segments]"));
+    }
+
+    public void testInvalidNegativeSegmentNumber() {
+        Exception r = expectThrows(IllegalArgumentException.class, () -> new ForceMergeAction(randomIntBetween(-10, 0)));
+        assertThat(r.getMessage(), equalTo("[max_num_segments] must be a positive integer"));
+    }
+}

x-pack/protocol/src/test/java/org/elasticsearch/protocol/xpack/indexlifecycle/ReadOnlyActionTests.java

@@ -0,0 +1,40 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.test.AbstractXContentTestCase;
+
+public class ReadOnlyActionTests extends AbstractXContentTestCase<ReadOnlyAction> {
+
+    @Override
+    protected ReadOnlyAction doParseInstance(XContentParser parser) {
+        return ReadOnlyAction.parse(parser);
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+
+    @Override
+    protected ReadOnlyAction createTestInstance() {
+        return new ReadOnlyAction();
+    }
+}

x-pack/protocol/src/test/java/org/elasticsearch/protocol/xpack/indexlifecycle/RolloverActionTests.java

@@ -0,0 +1,55 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.unit.ByteSizeUnit;
+import org.elasticsearch.common.unit.ByteSizeValue;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.test.AbstractXContentTestCase;
+
+public class RolloverActionTests extends AbstractXContentTestCase<RolloverAction> {
+
+    @Override
+    protected RolloverAction doParseInstance(XContentParser parser) {
+        return RolloverAction.parse(parser);
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+
+    @Override
+    protected RolloverAction createTestInstance() {
+        ByteSizeUnit maxSizeUnit = randomFrom(ByteSizeUnit.values());
+        ByteSizeValue maxSize = randomBoolean() ? null : new ByteSizeValue(randomNonNegativeLong() / maxSizeUnit.toBytes(1), maxSizeUnit);
+        Long maxDocs = randomBoolean() ? null : randomNonNegativeLong();
+        TimeValue maxAge = (maxDocs == null && maxSize == null || randomBoolean())
+            ? TimeValue.parseTimeValue(randomPositiveTimeValue(), "rollover_action_test")
+            : null;
+        return new RolloverAction(maxSize, maxAge, maxDocs);
+    }
+
+    public void testNoConditions() {
+        IllegalArgumentException exception = expectThrows(IllegalArgumentException.class,
+            () -> new RolloverAction(null, null, null));
+        assertEquals("At least one rollover condition must be set.", exception.getMessage());
+    }
+}

x-pack/protocol/src/test/java/org/elasticsearch/protocol/xpack/indexlifecycle/ShrinkActionTests.java

@@ -0,0 +1,49 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.elasticsearch.protocol.xpack.indexlifecycle;
+
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.test.AbstractXContentTestCase;
+
+import java.io.IOException;
+
+import static org.hamcrest.Matchers.equalTo;
+
+public class ShrinkActionTests extends AbstractXContentTestCase<ShrinkAction> {
+
+    @Override
+    protected ShrinkAction doParseInstance(XContentParser parser) throws IOException {
+        return ShrinkAction.parse(parser);
+    }
+
+    @Override
+    protected ShrinkAction createTestInstance() {
+        return new ShrinkAction(randomIntBetween(1, 100));
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+
+    public void testNonPositiveShardNumber() {
+        Exception e = expectThrows(Exception.class, () -> new ShrinkAction(randomIntBetween(-100, 0)));
+        assertThat(e.getMessage(), equalTo("[number_of_shards] must be greater than 0"));
+    }
+}